One of the biggest problems with meme-driven economics like this (and HN is ground zero for this kind of logic) is the extent to which people just don't cite numbers anymore.
There is some truth here: property values in high-income US cities are growing faster than incomes. And that's a problem, and worth discussing. But that discussion can't happen until people stop with the hyperbole. And needless to say, without discussion there can be no solution. (Which, after all, serves the evolutionary goal of the meme!)
[1] Which surely reflects an average occupancy of 1.5-2 people, so needs to be adjusted even farther downward.