That is a fascinating idea, and I think it would work for anything except a primary residence. (How can you tax "I'm 83 and will only leave in a coffin?") For

That is a fascinating idea, and I think it would work for anything except a primary residence. (How can you tax "I'm 83 and will only leave in a coffin?") For everything else, particularly investment or rental properties, it seems like a perfect setup. Like bringing the dynamics of the stock market to the property market. For primary residences, maybe it could be a "half-tax" setup (with actual exemptions for people who would be devastated by moving). So you would actually claim twice the taxable value, and if some developer came along and actually offered the 2x, you would be delighted to take it.