This is an incredibly bold statement. Most people like having sex, and in a natural state (sans birth control, online dating, internet porn, etc) there are going to be a lot of pregnancies. The idea that tax credits, welfare or parental leave is what is driving this situation is ridiculous. This feels more like a dog whistle about the welfare state, but even if you take away those "subsidies", people ain't gonna stop having kids, that's just not how the majority of young people of child-bearing age think.