It has to do with the relative spending velocity of the economic quintiles. The top quintile spends their money much slower and often just move it between their

It has to do with the relative spending velocity of the economic quintiles. The top quintile spends their money much slower and often just move it between their cohort. lower 3 quintiles spend their money quickly, and historically locally. Reagan started the shift away from taxing the most wealthy and the lower and middle classes have stagnated. Yes technology has pushed things worse with income distribution but the tax policies of the GOP administrations have worsened it greatly.