Agree with your "action plan", Scoozame, and the action might also involve civic governments, too.  Vancouver's could mandate that it is no longer acceptable to buy or hold a property with a major back yard.  It might take action on rezoning to help diminish the disparity.  This, to counteract a couple of factors that NOBODY can take action against: mountains and water, that limit available land for residential housing in the Greater Vancouver area.