Sometimes it is  hard to understand how someone like Krugman could have won a Nobel prize in economics, until you remember its winners are decided by a committee of socialist Swedes. Krugman and those who believe him always seem to forget that income inequality is basically calculated as a difference between those earning relatively high wages and those earning relatively low wages. They focus, of course, on the high earnings as if that were a bad thing, ignoring that in the process of earning those high wages those people must produce many times those earning in value which is captured by others in the economy, typically as lower prices for consumers, and which therefore do not appear in their simplistic calculation. A "crimp" like Dodd-Frank reduces not only the high earnings of some, but the enormous value they create for many others. In no way is that a good thing, because as it produces reduced income inequality, it also clearly means reduced productivity, value and GDP as well.