This really is a fixable problem. Heavy taxation on NPD (non-primary domicile) housing solves this by itself. It's just that convincing people this is in thei

This really is a fixable problem. Heavy taxation on NPD (non-primary domicile) housing solves this by itself. It's just that convincing people this is in their best interest will take a lot of effort - not to mention that there's a fairly ubiquitous problem of local politicians being in the pockets of property developers in the areas where these problems are at their worst. People still believe that their home is a good investment, without any thought given to who's going to buy it from them later or where that person will be getting the financing.