> You raise property taxes to pay for it, you don’t cut anything.
But that's my point. Berlin is not raising taxes and there's absolutely no indication that they will change that. If they wanted to spend more money, they'd either have to raise taxes (not going to happen) or get even more subsidies from the other German states (unlikely, because they're already getting billions per year, and those who have to pay aren't too happy about Berlin's wastefulness).
> You build it in zoning that is designated for housing.
They don't have enough areas zoned for housing, and they aren't even issuing enough building permits for the required amount of apartments that need to be built right now. How would that be changed? Do we just clap twice and voila, government suddenly works efficiently and the red tape gets cut back to reasonable levels?
The problem is that people want more housing, but they don't want denser cities, they don't want construction sites, and they don't want parks and open spaces to be converted into housing zones. Especially in Berlin, people are extremely against new development, see Tempelhofer Feld.