This. I can't even count the number of people I know who moved here out of college for an internship or entry level job paying about 30k if they were lucky. Most of them lived in nice neighborhoods, many of them in doorman buildings, and went out all. the. time. They certainly weren't doing it on their own salary.
When my wife and I moved here, we were making 80k in combined income and living together in a 1BR in Brooklyn, and it was still quite difficult to make ends meet and have enough money leftover to do anything other than stay in the apartment every weekend and watch TV. I can promise you those people making 30k are not doing it on their own. That literally would barely pay their share of a 3BR in Bushwick.