Again, that ignores the fact that rich people (who don't have to work) have less kids and that's been the case for ages, it just so happens that rich women have access to education and contraceptives and that's been the case for over a hundred years.
That's GDP of the country, and is not related to the number of children born to parents who don't have to work. It states that rich countries have a lower birth rate.
ignores the fact that rich people (who don't have to work) have less kids
Multimillionaires don't need to work, they could stop working and live off the interest on their wealth, yet their fertility rate is lower than people who make under 50k/year, which is less than the interest you make on a million in savings.
That's assuming they don't want to keep their big houses, expensive holidays etc? Generally expenditure grows with income.
I think your argument is that people don't have children for reasons other than wealth. My argument is that wealth and the ability to live a certain life style does affect people's decision on having children.
That's where you're wrong, at a certain point you generate enough from interest that all you're doing is accumulating more and more wealth, yet these people don't have more kids.