We have homeless people and abandoned houses because our culture is psychotic. In five or ten years, the situation will become so absurd and desperate that our individual habits of docility and submission will break down, and ordinary people will have a strange and radical thought that was completely obvious to all their ancestors from the first land animal until the first fence: the only person who "owns" a piece of land is the person who is actually occupying it. And since we all occupy land, we are all owners, and therefore we can factor out the whole concept of "owning," and just say, "we live on this land."
I really like the idea of ‘just occupying' a place. Anyone else keen to start looking for an abandoned house or warehouse or something? It'll be like Fight Club without the dissociative-personality-disorder or the vigilante terrorist army. (The fighting will be optional.)