>Imagine long-time residents getting kicked out not because a developer wants to make buck, but because the tax system requires that to happen.
Some of us think that would be a good thing. My elderly neighbour has been living on her own in a five bedroom house for twenty five years meanwhile there are people nearby struggling to raise a family in one or two bedroom houses. She doesn't need that house, she is just there out of inertia. Letting the tax system nudge people in the right direction is a good thing.