because there are even higher earners buying, pricing them out. So are they really 'high' earners?
I think the lack of supply is the true source of the problem.
There are of course still limitations to the impacts of higher density as well, the desired living conditions of many buyers is yard+reasonable commute, so there is an absolute physical constraint here as well.
Or a solution that speaks to that. E.g. A progressive tax like income is but in total residential property value.
Something like <$1m is 0%. $1-3m is 1%... Etc. Make the top rate untenable to own more than $Xm in residential like 10% + top rate for anything held under obscure ownership structure.... or whatever bands/percentages that seem right.
There is an increasing small group of people that own/inherit significant residential ownership. And while there is a physical constraint side of housing, fixing residential as investment vs place to live can take a heap of pressure off and is a much easier/faster point of solution I feel.
I cant remember where I heard but someone said residential property can either be good for investors or owner occupiers. Not both. Ultimately the government needs to prioritise occupiers in my view anyway as not just for happy people, but this brings stability and economic benefits to a society.
It's not sustainable generally and political will for ever growing prices will have to shift as demographics age and non-owners grow relative to population.
And if interest rates start going north in any real way it's going to be severe with some of the debt load you hear about so many people taking on.