Cash for vasectomy....

[Anomalocaris]

That simply does not follow, the fact that I am paid for work does not mean that I did not go to work voluntarily.

The difference is the particular vulnerability of the person with a drug problem, which introduces a particular debate about ethics that goes beyond that of normal wage labour.

It does more to help the welfare system, birth defects caused by pregnant mothers being addicts, potentially horrible lives for the children bought into the home of a drug addicts etc. It's not Eugenics as they are not selecting against a genetic defect, it's simply situational selection. Some people know they will probably not get off drugs, and don't want to have children because of the poor quality of life this child is likely to have, under this circumstance I don't think it's unethical to offer an incentive for action.

You might be convinced that it is not intended to select against a genetic defect. I think the social engineering aspect, plus the bribe, plus the invasive surgery bring it within ethical territory occupied by eugenics. It suppresses the freedom of the victim to decide to have children. It is an oppressive, manipulative, corrupt, bullying, right-wing, shabby and sordid practice. The Nazis would have taken to this procedure rather well.

What is the ethical problem with noncoercive bribing to encourage restraint in procreation when the result of the procreation is statistically very likely to suffer either very poor pre or post natal development environment, or seriously debilitating genetic defect?

One would think the probable welfare of any result of procreation should weigh more heavily in consideration about what and how much incentive to offer then whether the parent may be unduly susceptible to the incentive.