I don't think the number of tax brackets is that crucial, because if we wanted to flatten our structure—which I certainly advocate—we could reduce our 29% rate and our 26% rate.
It's probably a good thing that the bottom rate went down over the years from 17% to 15%, but we still have this 29% top rate. This top rate I would like to see come down—and that will flatten the structure.
Sometimes, in order to achieve flattening, you have to add a bracket. So when we added the middle-income bracket from about $70,000 to $120,000, it actually helped to flatten the structure, because there's a 26% rate there instead of the 29% rate.
So I think there are different ways you can approach this; you don't necessarily have to reduce the number of brackets.