Meanwhile, this is the kind of stuff that's been on my mind:
The author of the below linked article on the issue of buying kidneys (due to the crisis of too many people waiting for one while on dialysis combined with the shortage available from either deceased donors or living donors like myself) says:
"History suggests that once the rich and powerful figure out a way to exploit the poor in one way, they'll pretty quickly start pushing the envelope in related directions as well."
I say: Not all people who need a kidney are rich and powerful and plenty would do ANYTHING to raise the money to buy one, and it would be money well spent. If only they would allow the system to regulate this. Maybe instead of paying a donor the donor would get lifetime health insurance or another incentive.
My main concern would be that people taking money to donate a kidney get a very good health screening for their sake and the recipient's.
Donating a kidney to save a life is a relatively safe procedure for living donors. You can -- as many, many people do and don't even realize it -- live a full and healthy life with one kidney. The second is really like a spare.
The best solution? Have people OPT-OUT of being donors on the donor card rather than OPT-IN. It's worked wonderfully in other countries and let's face it, you aren't using it anymore at that point anyway. Plus, one person saves two lives (two kidneys).