What exactly do you mean by a one-house policy, though? How would it effect something, like... well, my own situation? Family owns some "spare" homes (sometimes they're rented out)*, that from time to time have housed other family members that were down on luck, having trouble, etc. Most of the homes titles are held by a particular couple. If things were limited to one title per person (especially if married couples were counted as a single person, or single households only allowed to have one), well... I know a fair handful of people that would have been in pretty bad shape. Myself and most of my immediate family included.
I can see what the concept is trying to avoid, I think, but even outside of profit-minded stuff there can be very good reasons for a individual to (want to) hold title (that is, legally/socially accepted control over a particular land parcel and its contents) over more than one home.
*And that'd be a question to SG's quote, I guess. What about stuff that's in between? Some folks live in a place part of the year, rent it out the rest (sometimes this is because leisure, sometimes because work-type stuff, sometimes it's family/tradition (religion, etc.) related), or will rent over a period and have non-renters live there over another. Where would stuff that's not strictly one or the other fall?