It should be, too many people = houses and food go up in price, not enough people = houses and food come down in price. Like most things there would be an ebb and flow in birth rate in relation to resource scarcity.

But nooooo, we can't possibly let housing prices come down, banks need them to defined as an appreciating asset on their balance sheets. So import demand and print money.

All animal populations are self regulating when you don't fuck with it.