Me and my partner want to start a family, but on my sole income we'll be paying ~50% of my take-home pay in mortgage + property taxes. It's probably not worth her continuing to work (although it's her choice) if we have a kid, due to the cost of childcare.
Belts will be extremely tight even though I'm well inside the top 1% income wise. That said, I still thank my lucky stars I am where I am, and can't imagine how someone on a median income feels about their prospects.