Ramesh, thatโ€™s fairly easy to do. Back in the 1980s the Reagan administration sharply reduced tax deductions for mortgages and other real-estate linked tax shelters. This move certainly played a very significant part in the real estate slump that followed over the next few years, which on some measures was (I seem to recall) the worst in half a century. Iโ€™d call that a crater. If you think about it, this should not be a surprise. Increasing the net financing costs of an investment (which is what eliminating/reducing tax deductions would do) must reduce its price. The only question is by how much.

On the other point (the AMT as a flat tax), heโ€™ll have to speak for himself, but I suspect that when Jeff Taylor suggested using the AMT as a crude flat tax it was not his ideal solution. He was merely making use of the tools that he had, so to speak, at his disposal.

Finally, Iโ€™m not clear what you mean by โ€œinvestments in childrenโ€ but it sounds like big government sticking its snout where it has no business being โ€“ and thatโ€™s not something that usually appeals to flat taxers.