Financial transactions are rarely a matter of consent between equals. There is almost always a power imbalance, particularly when medical issues are involved.
The law, in its majestic equality, allows rich and poor alike to sell their internal organs to try to make their power bill payment next month.
That's without explicit coercion (sure, I'll do X for you, so long as you sell your kidney).
Focusing on equal relations is missing the point, which is that the corporation (a more powerful entity) is selling you things, not the other way around. “Punching down” isn’t acceptable, and all that.
What if I offer someone a million dollars to commit suicide and harvest all their organs? Will desperate people accept that offer? Is it ethical?
That is rhetorical, it is highly unethical. And similarly, desperate people will sell organs under financial pressure and limited or no regulation on the sales tactics or accurate disclosure.
A more effective plan would be to offer $100-$1000 cash payment at time of registration when getting a license to be an organ donor. It is hard to find matches. Better and more economically efficient to have a broader pool of potential donors, for all parties. And since the donors are already brain dead, no ethical dilemma.
The law, in its majestic equality, allows rich and poor alike to sell their internal organs to try to make their power bill payment next month.
That's without explicit coercion (sure, I'll do X for you, so long as you sell your kidney).