It seems to me that you’re effectively arguing for a solution to a problem which is preventable in the first place.
I’m suggesting that if we didn’t have forced welfare programs and the like in the first place, that survival of the fittest would be a good enough self-regulating mechanism for the population. Many people who are poor only end up having kids because they know the state will provide them with money. It is an artificially created problem in modern society.
The decisions of others, provided they are not harming anyone else, should be none of our business.