Because why does it take hundreds of thousands a month to raise a baby, or a toddler? Wtf is that being spent on? Even if he was raising the child himself he wouldn't be spending that much money, it's just stupid to think that everyone spends money on their kids as a percentage of their income, and not a set amount that strains different people of different earning levels in different ways. 'Let's order takeaway, I'm rich so we must spend 8% of my daily income and get fresh lobsters and caviar'.

Just put a fucking cap on it after a certain amount, it does not take anywhere near that amount of money to raise a child nor give them a good education and setup for life.