Washington’s Blog 
Sunday, September 4, 2011
I’ve repeatedly noted that rampant inequality destabilizes the economy as a whole, and actually causes depressions … but that government policy is increasing inequality.
I’ve also pointed out that no one – liberal or conservative – likes runaway inequality.
Now, Jeffrey P. Thompson (Assistant Research Professor at the Political Economy Research Institute of the University of Massachusetts, Amherst) and Elias Leight (Assistant Analyst Tax Analysis Division of the Congressional Budget Office) have demonstrated that when the wealthiest Americans get richer, everyone else becomes poorer.
For example, they demonstrate that when the wealthiest Americans get 10% richer, middle income Americans get 2% poorer.