well, aside from the sillyness, wouldn't increased boredom also increase the demand for entertainment, shows, sports, vacations, telephone, internet, software, computers, household goods, cable tv, and food? possibly creating health problems do to over eating and depression?
and why would increased birthrates make females unhappy? thats a bit of an assumption, isn't it? but to follow, unwanted children tend to grow into criminals, so an increased birth rate, in your scenario would increase Government costs, (law enforcement, and corruption?)