I didn't read GP as expressing any explicit judgement - it's a simple question of the political reality, no matter what position you take. If the state takes in fewer taxes, the shortfall must be balanced by some combination of:

- increases in other taxes/other income sources

- decreases in services

- public debt

As someone who shares your view that housing shouldn't be purely market-driven, IMO it's especially important to consider the other side of the equation, because some people invest a lot of time, effort and money to prevent the first option.

One "obvious" income source would be to hire more tax collectors and let them focus on the largest conglomerates, but not like that's ever gonna happen.