Somewhere not far from you, a person is sitting in a chair with a needle in their arm, and a machine is doing the work their kidneys have stopped doing. Four hours at a time, three days a week. They have been doing this for two years. They are on a waiting list. The list is long, it moves slowly, and some of the people on it will die before it reaches them. This is not a thought experiment. It is happening this week, in a city near yours.
There is a man who would sell that person a kidney. He has two, he needs the money, and he carries a debt much like the one we talked about last week. He has done the arithmetic and made his decision. He wants to sell. The person in the chair wants to buy. By their own reckoning, both would be better off. And the law forbids it.
Last week, you said no to that as well — before you had a single reason. A flat refusal: this should not be for sale.
This week, someone takes that refusal seriously and asks one question in reply, and will not let the subject be changed until it is answered. The question is: who, exactly, were you protecting?
This is Philosophy for Us — philosophy for everyone, no degree required. This is the second of eight episodes on money and what it can't measure.
Last week we separated two worries that had been fused into one. On one side: whether the deal is fair, and whether you can afford it. On the other: whether the thing should be for sale at all. You were left holding a recoil you could feel but could not defend. Tonight I hand the floor to the person who thinks that recoil is a luxury — one you can afford because you are comfortable, and whose cost is paid by people who are not. His is the case you will find hardest to answer, and tonight I am going to let it win this exchange.
I am also going to ask you to lose to it honestly: not to nod along, and not to look away, but to take its full force. An answer you reach for before you have earned it is worth nothing.
You will want to know where I stand, in the end. Along the way I will tell you what I can defend and what I cannot. But not tonight. Tonight belongs entirely to his case, and the only honest thing is to find out how far it reaches.
Let me describe the person whose case this is, because the version of him you may be picturing is a caricature, and the caricature is easy to dismiss. You may be imagining a libertarian who thinks everything has a price and people are nothing but consumers. Refuting that figure refutes no one, because that is not the position in front of you.
The position in front of you is a serious one in moral and economic thought; some of the people who hold it have won the Nobel Prize in economics. And the first thing this argument does — before a single number — is agree with you. Not grudgingly. Completely.
It says: you were right last week. Your refusal is not about the price. When you flinch at the kidney sale, you are not bargaining; a higher offer would not change your objection, and that tells you the objection was never about the terms. It is a worry about the thing itself — about what the selling does to it. You called it a worry about meaning, and that was the right description; it is not mere squeamishness. On this, the economist grants you everything.
Notice what has happened. The one tool you carried out of last week — the distinction between the deal and the meaning — has been handed back to you intact, and accepted. The economist does not say you are confused. He agrees that you see your own feeling clearly.
And then he asks: so what?
A worry about meaning is still only a feeling until you can say what it is a feeling about. You have a strong sense that selling the kidney damages it. Then say what is damaged, and for whom, and why that damage outweighs what he is about to place on the other side. Because while you work that out — and you have admitted you cannot, yet — he can tell you what your feeling costs, in money and in lives.
Here are the numbers. They come from Gary Becker, who won the Nobel Prize in economics in 1992, and his colleague Julio Elías, in a 2007 paper. Far more people need a kidney than there are kidneys available, and people die on the waiting list every year, steadily and predictably. Becker and Elías worked out the arithmetic of a legal, regulated market: pay a donor somewhere around fifteen thousand dollars for a kidney, and enough donors would come forward to eliminate the shortage — not reduce it, eliminate it. The total cost of a transplant would rise by roughly twelve percent. That is all. For about a twelve percent increase in the cost of an operation we already perform, the waiting list would substantially clear.
Consider one fact in that. The deaths on the list are not an unalterable fact of nature. We tend to treat them as tragedy, as simply the way things are — the way you treated the rent last week. But there is something we could do that would prevent most of them, and we have decided not to do it. The list is not something that merely happens to us; it is something we are choosing. Every year the ban holds, a knowable and substantial number of people die who need not have.
So the economist is not asking you to like the idea of a kidney market. He is asking you to look at the people on the list. He says: I have a way to save them. You have a feeling that says no. You have told me yourself the feeling is not about money and not about fairness — it is about meaning. Then show me that meaning, and show me it is worth what it costs, because at present you are asking those people to keep dying for something you can feel and cannot name.
That is the ground his case stands on, and it is solid. I am not going to pretend there is a hidden flaw in it. There is not — not yet.
You have a reply here, and you should make it, because it is the obvious one. You want to say: the feeling counts precisely because it is a feeling — a moral perception, older and deeper than any calculation, and no calculation has the standing to overrule something you feel in your body about a human body.
The economist has heard this, and has a name for it and a colder, more careful way of treating it. The name to know is Alvin Roth, who won the Nobel Prize in economics himself, in 2012, and who designed the systems that match real kidneys to real patients — so he is not speaking from outside the field. In a 2007 paper called "Repugnance as a Constraint on Markets," Roth says something that at first sounds like agreement. Repugnance, he says, is real — not a mistake, not noise, but a genuine force in the world, in his phrase "as real as technology." It sets the limits of which markets a society will permit, just as physical law sets limits on which machines can be built. So Roth takes your refusal seriously, as a fact about the world. He has spent his career working around it.
But then he asks the question you have been avoiding. He asks: which repugnance? Because the feeling you are trusting — the strong, immediate, pre-rational no at a thing being put up for sale — has a history, and we can look it up.
People once felt exactly that no about charging interest on a loan. Not mild disapproval — moral horror. They called it usury; they called it a sin; they said it was unnatural for money to breed more money, and they meant it in the way you mean your no at the kidney. It was a gut perception about an exchange that should not happen. And now the entire economy runs on interest — your savings, your mortgage, your retirement, the loan you are struggling to repay. The horror is simply gone. We did not out-argue it; we outgrew it, and we can barely remember having felt it.
The same holds for life insurance. There was a time when putting a cash value on a human life — so that a person's death would pay a sum to their family — struck people as ghoulish, a wager on someone's death, a trade in mortality. The feeling was strong, widely shared, and, by its own lights, a perception of something sacred being turned into a number. Today it is the person who fails to buy life insurance who is scolded; the responsible adult prices their own death and provides for it. The recoil reversed into its opposite within a few generations.
Roth does not dismiss your feeling. He does something more uncomfortable: he places it alongside the others. Your no at the kidney stands in a row with the no at interest and the no at life insurance — the same shape, the same strength, the same certainty that something sacred is being violated. And two of the three turned out to track nothing but the customs of a particular time and place. They felt like perceptions of a deep truth. They were the residue of a culture, and when the culture changed, the truth they were supposedly perceiving evaporated — because there had never been a truth there, only the feeling and the world that trained it.
And here is the part that is hard to hold on to: Roth is not saying your recoil is therefore worthless. He is careful about this, and you should be too. He is not saying all repugnance is prejudice. Sometimes the gut is tracking something real. The point is sharper than "get over it." The point is that you cannot tell which kind you have by how strongly you feel it. The horror at usury felt exactly as deep and as certain as a true moral perception would feel. From the inside, the reflex and the genuine insight are indistinguishable — which is the very thing you admitted last week, when you noticed your recoil had a definite shape but could not say whether that shape was knowledge or training.
The economist has taken that admission and made you pay for it. You cannot lead with "but I feel it so strongly," because strength of feeling is what the horror at usury had, and it was mistaken. So the burden of proof has shifted to you. It is no longer his job to show that your no is mere prejudice; it is your job to show that it is not — to show that this recoil is one of the genuine ones and not one of the residues. And you have to do it while people are still dying on the list, and the man with the debt is still waiting for your answer.
What you are doing now, I do too: you are reaching for the answers. There are two of them, and they are good ones, and you have half-said them already.
The first is: it was not really willing. The man only chose to sell his kidney because the alternative was going hungry — and a choice made under that kind of pressure, with no real alternative, is not a free choice at all. The second is: the money changes the thing. Perhaps selling the kidney does something to it — turns a part of a person into a product — that no amount of fair dealing can undo.
Both of these are real, and I am not going to dismiss them. I will tell you where they belong. The first — whether it was willing — is next week's episode, in full. The second — whether the money changes what the thing is — is the centre of the whole question, and it arrives a few weeks from now, on a case so clean you will not be able to argue with it.
But I am not going to let you use them tonight, and I want to be honest about why, because bringing them in now would be the easy thing to do. If I rescue you here — if I hand you "it was not willing" before you have taken the full force of what you are up against — you will reach for it by reflex for the rest of your life, the way people reach for "budget harder" or "blame the system," as a way to stop thinking. And it is not strong enough for that; you will find out next week that the economist can answer it. So tonight you face him with what you actually hold right now, which is the bare feeling: the no, with nothing yet underneath it.
And the bare feeling loses. I have to say that plainly, because I am not going to misreport where things stand. Set your undefended no against the lives on the waiting list, and ask a neutral person which counts for more, and they choose the lives. Of course they do. On one side, people are dying who need not. On the other, you have a feeling you have admitted you cannot yet explain, and which has a documented history of being wrong. It is not close. Tonight, it is not close.
And the part that matters most brings the whole thing back to your own situation. Ask who can most easily afford to hold that no. Not the man with the debt; he cannot afford it — the no is priced out of his reach, like everything else. You can afford it. You felt the recoil at home, comfortable, protected by circumstances the market mostly leaves intact for people like you. The recoil comes cheapest to the people who will never be asked to pay for it. Which raises the possibility you could not shake last week and cannot shake now: that your no is not wisdom, but simply one more comfort — the comfort of a clear conscience — and that, like any comfort, you can keep it precisely because you are not yet desperate enough to need to sell. If that is what it is, then on the day you can no longer afford the rent, the no should disappear, the way it disappears for nearly everyone who actually becomes that desperate. And a feeling that survives only while you can afford it is not a perception of anything. It is a preference for thinking well of yourself, and it is being paid for by the people on the list.
That is where this stage ends. Not with you convinced he is right — you are not; the no is still there; neither of you talked you out of it. But with you unable to say a single thing in its defence that holds up against the list. The feeling is intact and the case for it has collapsed — both at once — and that is exactly the position I told you we were going to occupy. It is an honest place. It is simply not a comfortable one, and I am not going to pretend otherwise.
So far you have watched me make his case. That is not enough. You do not really hold an argument until you can build it yourself, from the parts, on a case no one has walked you through. Try a different one, and this time you do the work. I am going to step back, and you are going to be the economist.
Bone marrow. Someone with leukemia needs a transplant of the tissue that makes blood, and for that they need a donor whose tissue matches theirs — a match so rare it is often one in many thousands of strangers. If a match is found in time, the patient can be cured outright. If no match is found in time, the patient dies. That is the whole shape of it: an extremely rare match, and time is short.
Now the part that matters. The way this is mostly done today is not the operation you are imagining. There is no drilling into the hip, no surgery. For most donations now, the donor is given a few days of a drug that pushes the right cells out into the bloodstream; then they sit in a chair, much as they would to give blood, for a few hours, and a machine filters those cells out and returns the blood. The drug brings aching bones and a few flat, flu-like days, and the donor is tired for a while afterwards. That is the cost. It is real, but it is small, it passes, and there is no surgery and no permanent loss.
And for most of the last forty years, paying that donor was a crime. You could thank them; you could not pay them, because paying for parts of a body is banned, and marrow was swept in with the rest. Lately some courts have begun to carve out this modern method in some places — but the basic legal rule holds almost everywhere: you may not pay a person for what their body produces.
Now you make the argument. Don't look to me. Build it.
You would start where he started. Weigh the cost to the donor — a few hard days — against what is at stake for the patient: a whole life, cured, not merely managed. Then look at what the ban actually does. It does not protect the donor from much; the cost to him is small and it passes. What it does is keep the registry thin. Fewer people will give up two uncomfortable days for nothing than would give up two uncomfortable days for a real sum of money — this is simply true of people — so matches that could have existed do not, and patients who could have been cured run out of time and die. And then you ask the question, in his voice now, because it is your argument: who is the ban protecting? Not the donor — he is barely touched. Not the patient — the patient is dead. It protects a feeling: the feeling that bodies should not have prices. And it charges that feeling to a person with leukemia, who pays the entire cost, with their life, so that the rest of us can keep our feelings undisturbed.
That is you doing it, not me. You built the case, and it gripped, and it gripped because it is a serious one — on bone marrow, perhaps a decisive one. I did not trick you into it. You followed the reasons, and the reasons ran his way, and you could not find the point at which to object — the place to say: here, this is where it goes wrong. You looked for that point. It was not there.
And here you cannot even use the first answer — the one about a choice forced by poverty — because no one is selling a piece of themselves to survive. It is a few hard days in exchange for money, freely undertaken, like a hundred other things people do for money. The objection from duress does not apply here. Which means this case reduces the argument to its essentials — the bare question, with no unfairness to argue about and no serious sacrifice to point to: is there anything wrong with the sale at all, once the deal is clean, the cost is small, and a life is on the other end? And tonight, on this case, with what you have in hand, the honest answer is that you cannot show there is. You feel that there might be. You cannot show it. That gap — between what you feel and what you can show — is the whole problem, and you opened it yourself, in your own voice, with no one else to hold responsible.
Let me be honest about the outcome before I tell you what you carry out of tonight, because they are not the same thing.
The outcome is that he won — not the series, which has barely begun, but this exchange, cleanly, on the only ground you brought to it. Your recoil is still standing; you did not stop feeling the no, and he never actually disproved it. He did not show you that the kidney sale is fine. What he showed you is that you cannot yet say why it is not, and that while you cannot, real people pay for your silence with their bodies and their lives. The feeling survived. Its defence collapsed. He takes this exchange.
And here is what you carry out, which is stranger than a simple defeat. You came in tonight able to feel the no. You leave able to make the case against it — better, probably, than you could when you sat down, well enough that you built one yourself, on bone marrow, unaided, and watched it prevail. That is the gain, and I will not pretend it feels like one. The feeling you could not defend when we started, you have now learned to attack expertly — and you still hold it. That is not comfort. A person who can argue well against something they still believe is not at rest. But it is the only position from which the rest of this is worth doing. You cannot earn the answer to a hard question by refusing to face how hard it is.
This was the first real setback — the stage where the argument moves against you before it moves for you. Nothing has been settled in your favour. The list is still there. The no is still undefended. And you can no longer reassure yourself that the economist simply does not understand your feeling, because he understood it, agreed that it was real, and defeated it anyway.
Next week you get to bring in the first of the two answers — the one I made you hold back tonight: but was it willing? We will take the strongest form of it: that consent given under the pressure of poverty is not really consent, and that a market built on desperate people is built on a kind of force. We will give it everything it has. And then I owe you the hard part, the part that will cost something: I will show you where even that answer runs out — how a careful economist can correct the unfairness, fund the alternatives, regulate the terms, and hand you back a market in which the consent is genuine and the no is still there. Which tells you something you will not want to know: that your recoil was never really about fairness either. Come in ready to win, finally — and then to watch the win not be enough.
So take one question with you through the week — carry it, do not try to solve it. Ask what the economist asked you, in your own voice, with no one watching: who, exactly, am I protecting — and can I name it, or do I only feel it?
Thanks for listening. I'll see you next time.