There has been some interesting debate about taxes recently- specifically about the expiration of the Bush-era tax cuts. It seems to me that an argument for less taxes on the rich is based on an ideological America-dream-ish theory. This op-ed by Nicholas Kristof explores income inequality in the states. Unfortunately, with all this inequality, the idea that Americans can hope for the dreamy economic mobility is fading quickly. And the actual empirical data about who's relative tax breaks induce macroeconomic growth points right to lower income folks- they put that money right back into the economy.