Harvard professor Michael Sandel published a book called "What Money Can't Buy". He believes that buying and selling good things at a clear price will "corrupt" this good thing and make society more unequal.
There are many good things in the world that cannot be bought with money. A society in which the utility of money is very limited and the rich cannot do whatever they want is acceptable to us. And this includes that the rich have to face the problem of birth, old age, sickness, and death like the poor. In such a society, the comparison between people is multidimensional. You have a lot of money, but I have great knowledge; you are beautiful, but I am strong. Money is not the only important thing. People can have a variety of pursuits, and people's lives are relatively free.
But if money can buy everything, it's completely different. You can spend money to hire someone else to serve as a soldier for you, you can make genetic customizations for your offspring, you can send your children to a good university, and you can even buy life without having to have children yourself. Such a society becomes a one-dimensional society: Any two people standing together, just look at who has the money. Life in such a society would be very painful.
If there is a medicine that can improve people's lifespan, even if it sells very expensively, the first wave can only be used by the rich. It increases the inequality in the utility of money, and we recognize it. Because the market can automatically make this medicine cheaper, everyone can use it in the future. But if this medicine must be prepared using the lifespan of the poor, for example, if a rich man spends 100 million US dollars, he can use the poor man’s ten-year lifespan for one year, and he can use all the money to "recharge" his lifespan. , It won't work. Because this medicine does not reduce inequality, it makes society more unequal. Even if the poor are voluntary, we cannot allow this to happen, because a society where money can do whatever they want is terrible.