Govt should adopt a policy of gradually increased property tax based on the number of housing units (or total assessed value of all housing property) one person/business owns. It should be to the point where one cannot use buying/selling/holding housing property as a way to amass wealth infinitely. Maybe to a certain point, but not to the extent allowed now. To me, holding a vast number of rental units and amassing a…
Not saying this particular policy ameliorates the issues you're talking about, just that a precedent for it exists in taxation policy in the US.