>>brtkdo+T5
Upper-middle and upper class aren't having children either though, so my bet is on the latter side of your argument. Huge opportunity costs for having kids before your mid 30s, and afterwards, it's a bit late to have more than a couple kids to have sustainable population numbers.
Definitely a bit hypocritical of me, since I'm also a part of the problem who doesn't want to have kids. But, at least for me, it's not worth it right at this time.