>Most folks don't do drugs excessively. But if it is OK for a middle class person to drink once a month, I'm OK with poor folks drinking once every few months. Or other drugs infrequently (i'm pro-legalization of many things). If you don't want folks to do drugs all that often, the only tool available with subsidies is to subsidize rehab and/or medical care and the family care that might come with inpatient rehab programs.

You don't subsidize alcohol, you tax it. Then you borrow a leaf from the Australian playbook and add a puke green coloring to it and force it to be sold in brown cartons with pictures of dissected livers.

>8 kids? How the heck do you expect to combat that with subsidies except though making sure birth control is nearly free (including the doctor's visit for women to get it, and actually offering low-cost sterilization). This completely glosses over the need for fact-based sex education (rather than the abstinence-only sort popular in some areas), for instance, and does nothing to deter folks that want 8 children.

You force sterilize people after the second child. And pay people to get sterilized with one or no children.

Unpleasant but when we are hitting the limits of what the planet can sustain and the best hope is 'we will go to Mars', doing unpleasant things so we survive is the better alternative to the cannibal holocaust we are setting ourselves up with.