So in the past, people were sort of pushed into mariage and to have kids. And this went on for centuries actually. This caused that even if you didn’t want to have kids, you had some. Humanity drag those people’s genes even if they didn’t want to. But now, with more free world, we sort of get rid of those people, the only ones who copulate will be the people who want to. And in the next generation we can expect more people who want to copulate and so on and so on. Good
This isn’t a problem for the future, this is already happening right now. At least in Germany. Elder care is atrocious. Old people who didn’t buy a house or similar are piss poor. And it’s getting worse.
As far as I know this is the worst in developed nations as rich people tend to have less children.