It wasn't really supposed to be about money vs fertility rates. I was trying to provide some observed examples of why having more money might mean more expensive kids. Or how being poor means the cost and expectations are lower.

I've always believed that it isn't money itself, but access to healthcare and education that lower fertility rates. Money correlates really strongly with access to healthcare and education.

Having good education and healthcare leads to birth control and maybe an abortion if the BC fails.

When a family of three is making $15K a year, do you believe baby four, five and six were planned out in agonizing detail? Or do you think maybe they weren't planned at all?

And I do believe more money going around would help. If the perspective is "I can't afford it", those who are doing OK will not have children if they can help it.