[big-green-man]

That is also not working where it is tried.

But even if you do that, you'll have an issue in a generation or so when those childless people are old. They're retiring, they're drawing from pensions and social security programs, they're using the hell out of the medical services, and someone has to pay for that. They don't have kids to take care of them, so all that capital that went towards the children gets siphoned from them in their working years. Now they're in a situation where they can't afford kids, and that trick can't be done anymore. It won't actually get population growth up over a few generations.