Superstimuli and the Collapse of Western Civilization
I think the fictional evidence misses a key factor in raising kids. At least for some people the continuation of a line, that line either being blood or values. I think most soon to be parents don't look forward to the nasty sleepless evenings with newborns or such. But give the availability of abortion, we still do not see L'Dolce Vita culling all humans from the reproducing herds.
People do enjoy long term endeavors. I find the idea that my line will stretch far into the future to be a very good driver in my quest for higher education and wealth attainment. Delaying my own gratification is an integral part of that quest. I, in fact, hope to lay down a family "constitution" to instill my values on my children's children. If I am going to give them wealth they better damn build an empire with it.