I don't know the details on that, but I'll find out... I tend to think it's more to do with the amount of tax revenue taken in; not the tax rate on the individual. That would make sense, and supports the theory of lower taxes = higher tax revenue.
Charles
That doesnt make sense. There is a theory (that I pseudo subscribe to) that says that once tax rates are elevated beyond a certain level (45% or so) then there is no difference between revenue at the 45% level or anything higher (eg 75%).