"get a roommate or move"?
You have the option to pass on such a tax burden, as do any other home/land-owner(s), which is relevant to the conversation.
What point are you making relevant to that?
It seems the goal is maximizing tax revenue, punishing hoarders of land, and pushing for communal living. The exact case I think it is imperative to avoid is removing the elderly (cough, less useful) from their forever home in the guise of progress.