Comments like Bloomberg’s are common: if you cannot afford to live in the city, don’t. Every so often, social media will convulse over some urbanite claiming they can’t afford a middle-class lifestyle on $450,000 a year or some similarly princely sum. A common retort, even among self-styled progressives, is that they opted out of a middle-class lifestyle the moment they opted into an apartment on the Upper West Side. They chose to spend their money on an unattainable luxury, no different than if they’d purchased a speedboat or begun collecting pricey art.

