How?
Expropriation or nationalization is de facto impossible in a developed democracy in 2023.
Any proposal as such will be bogged down in courts for a decade, and the politicians who proposed it will have been voted out of office by the 60-70% of the population that owns some kind of property.
How? This is vague.
> creation of state-housing funds
How? Who holds the liability and underwrites this?
> widespread state construction of public housing
How? Is there even a trained construction workforce anymore? In the US at least this no longer exists after 2008 [0]
I'm not trying to be dismissive btw. I used to work in the policy space and there are organizational and liability issues that acted as a blocker against a number of the stuff you mentioned.
[0] - https://www.axios.com/2023/02/10/construction-help-wanted
These will also fly the workforce in from Central Asia.
In case if Zurich, I imagine that supply is limited due to its geography as well, and of course by wanting to preserve the quality of life.
Depends. If the profit is in more expensive housing, than private enterprise will bias towards that and ergo be less efficient at building lower-margin "affordable" housing.
Ideally, in a perfect frictionless economy populated by spherical cows, yes, private enterprise will more efficiently allocate across the entire spectrum of market needs -- so in principle, I'm agreeing with you.
But spherical cows make lousy roommates.
Any other suggestions? Remember this is Switzerland, so you can't do anything the population doesn't actually want otherwise they'll vote it out.
Landlordism, as Adam Smith himself identified, is a destructive, parasitic drag on economies that should be minimized at all costs. Otherwise, you end up with what we have now, Capital owners chasing after unproductive returns by limiting construction, bribing politicians, and generally making everyone else poorer and more miserable.