Earlier quoted context omitted.
The fact that poor people spend more money on things than rich people, once you include replacing them when they wear out. Or do you think that it's just that the poor people are held down? (Cue stories about people working their way out of poverty and thus proving the poverty trap isn't a real thing)
I see an interesting form of this that isn't exclusive to the poor: daycare. My wife has the luxury of not having to work so we have never used daycare. That's tens of thousands of dollars, hundreds of hours driving, not getting sick all the time, not needing a second car, the list goes on not to mention the immeasurable cost of missing out on the absolute best hours of your child's life.
You'll miss out on a lot of the time with your kid, but on the other hand they get to socialize a lot more from a very young age already. Some parents also burn out at home after a while, but that of course depends on the person.
I realize this went quite offtopic, sorry about that.