By the same kind of organized political resistance that affects changes of a much larger scale all over the country. It amazes me that in a year where a coalition of white working class voters were able to propel someone like Trump to the highest office in the land, that people of far greater means see much smaller political change as impossible.

The coalition impeding affordablity now thrives precisely because tech industry workers refuse to align themselves with the lower classes suffering the brunt of the damage under these circumstances. The ownership class then gets to paint themselves as trying to defend against all these encroaching barbarians that are making things tough for the little folks, all the while profiting from the exploding housing costs. They consolidate power around keeping out the "other," and then turn around and use it to soak tech workers (and by extension their companies) with higher rents. The play the bottom and the middle against each other and stay on top.

The hostility is a ruse, just like it is in politics on the national level, and it has to first be shown for the lie that it is. As an example, what if wide swathes of tech workers held rent strikes until more affordable housing is built for low income residents? Suddenly the narrative that sustains the ownership class becomes less and less coherent, and space is opened up for actual reform.