[akgerber]

Depends— if you're a single adult in NYC, a decent bedroom in a share can be had for $1000 with heat and gas included (and that's also a normal way of living for successful adults), and one doesn't need a car, so bills needn't be that high. Transport is either an unlimited Metrocard paid pre-tax or provided free by your employer, or a bicycle— so that's around $70/month, plus whatever you want to pay for cabs (but rarely need to). The upper limit on entertainment costs is extremely high— but there's also way more awesome cheap/free stuff happening than one could possibly do.

Of course, if you're trying to raise a big family, the math works out a little differently.

[overcast]

Sure, but who wants to live in that $1000 apartment, shared with other four other people? When you start making those big six figures, no one wants to deal with that crap. You want more luxury. That's the point of moving up right?