We have a thing in Melbourne where empty places can be fined. They can track by utilities use. There's a process for appeal etc etc but it amounts to: "you have a liveable place, let someone live there"

I have no problem with this. If investors argue it is a shit deal, that is fine, get out of the market and let someone who wants to live there buy it.

I firmly believe that housing cannot be both an investment market AND affordable for everyone.