How about only allowing a tax deduction on the first loan on the first house? The people with multiple houses are generally those whom are more well to do so it would simplify the tax code, raise revenue in a progressive fashion. You could phase it in to reduce the perturbations. tim
You've already dismissed the concept expressed in #msg-499147, so I hesitate to mention it. Even so, I think one should consider ideas that might inhibit the compounding effects of corporate greed on our lives.