If it ever becomes viable Niven predicted that the death penalty would soon be enacted for things like jay walking and fender benders, right? It would be old rich people getting body parts from young criminals to extend life. Pretty gruesome. If I remember that was part of the impetus for some of humanity to actually leave earth and start living in space, it’s been a while since I read those.
Freegards
Yes, and people supported it as both population control and increasing life expectancy. There were characters living to 140 with the help of said transplants.