They used older kids to watch younger kids, and generally let the kids fend more for themselves (my boomer dad was the oldest of 8 kids, and that was his experience, but having his grandparents die of spanish flu after WW2 hurt and helped a bit). I actually kind of admire that, and think we've lost something with more hands on parenting.

I totally agree. In a sense, FAANG salaries aren't especially high by historical standards, it is just that everyone else has fallen so far behind. $500k/year household income is firmly middle class, and is like earning $135k in 1980, my dad made more than that contracting in building nuclear plants with an associates degree from Spokane Community College.