It generally does. The exception would be very well-compensated people in the corporate world who can afford au pairs and nannies, and, effectively, the modern equivalent of household servants. This is how the Sheryl Sandbergs of the world "lean in" and "do it all" — lots and lots of hired help. There is no other way.

I am not rich, and I ended up the single dad of a two year-old recently. So I am still trying to figure that puzzle for myself. Fortunately, I do have the flexibility of being self-employed, but on the other hand, if I don't work (long hours), neither I nor my son will have much to live on.