I think the issue is the difference between positive and negative reinforcement. positive reinforcement with money may attract tainted blood, but negative might

I think the issue is the difference between positive and negative reinforcement. positive reinforcement with money may attract tainted blood, but negative might not, unless you count blood borne diseases which predispose to suicide. Suppose you were to legalize euthanasia for blood donors. i.e. you could earn the right to assisted suicide after 5 years of regular donations, no questions asked. That way the religious lobby gets shut up because the blood is maintaining the population rate and the chronic mentally ill like myself can have a comfortable exit.