This is a little bit of hyperbole. I think the magic number to live in Manhattan comfortably for a family of four is probably around $800k, which will be approximately $350k by the time you max out retirement accounts, fund 529 plans for your two kids and pay taxes. Anyone making close to a million wants to live in a place that's convenient and befitting of their effort so mortgage or rent will easily be $10k a month, so you left with $230k. a good daycare is going to run you $2500 per month, if you have two kids in daycare you are down to $170k. You're probably going to be spending $30k on utilities, groceries, food, clothing, (if you are frugal). You are down to $140k, out of that you might want to to take one or two vacations and probably want to put some extra money away in a brokerage account so you can retire early....etc. if you want to send your kids to private schools...you are down to zero.
A friend of mine tried recruiting me to NYC a few years back and I just laughed in his face, even as a single person making in the top 1% I wont feel rich in NYC.