Do you want them all living to 95 in government funded nursing homes? Letting them buy junk food, beer, and cigarettes is cheaper in the long run.
Something tells me they will find some other way to win darwin awards. What we call welfare used to be an utterly private function (churches, benevolent societies, etc.) and the government (i.e. our tax monies) didn’t get involved at all. That’s the best model. Short of that, don’t tax me to get folks blind drunk, that’s evil.