Gentrification step 13: vote out the pre-existing population's preferred politicians and install new "free market" policies (since the "free market" works in favor of the people with the money the new policies will benefit the richer new comers).
Building is the one variable of the three he cites that is reasonable to encourage IMO. But the pre-existing population here has demonstrated a clear disdain for building. So who is really to blame then for the inflation and displacement and thereby the gentrification?