1. Property taxes, especially residential. The taxes should be proportional to the property you own. A family owning one house is not in any way compared with a one owning two or twelve, so you tax them accordingly. One other simple thing that a lot of people seem to always miss: a property needs taking care of; so, its not just the taxes, its the painting, mowing, renovations and they are like a yearly subscription. Every property has a yearly maintanance fee.
2. Institutions snatching up residential property. This is a bubble creator and an absolute homeownership killer. I don't know who thought was a good idea to let companies legally own residencial homes or what is the short-term or long-term profitability from it, but they are massacring the market. One tiny example: BlackRock preparing a $50 Billion fund to grab homes the moment the market starts correcting itself. Unfortunately, this has started a phenomenon in the US and adopted by the world, like always, and if nothing happens to stop this in the US, nothing will stop it for the rest of the world. You can hate it or love, its how it will be for a long time. The US sets the pace and the world follows it. To make this happen you either need a "crazy" president like Donald Trump, who no-one can predict what he will do next, or something of a revolution from people themselves. Nothing else, not a chance.