Middle-class and upper-middle-class people generally do not have enough wealth to afford full-time live-in servants to take care of their kids for them. Having

Middle-class and upper-middle-class people generally do not have enough wealth to afford full-time live-in servants to take care of their kids for them. Having enough money for a somewhat fancy house isn't that rich, and kids don't just take money, they take a lot of time. Personally, I don't really want to sacrifice all my free time for the next 10 years or so.