Larry Niven, the SF writer, had a series of books set in his own future history, where science had progressed to the point a heart transplant was like a muffler job...in and out same day with little rejection...the same kind of thing for arms, legs, kidneys. The sheer demand caused the government to set up "organ banks" fed by the dis-assembly of capital criminals. (This idea actually might have some merit, but the ACLU would howl, so it will have to wait until after we gut them.) So a murderer got to repay his crime by supplying a heart, twelve quarts of blood, two kidneys, etc. However, people being people, before long the aging population were voting the death penalty for tax evasion, check kiting, jay walking...
What a Brave New World that has such people in it!