http://thinkprogress.org/economy/2014/10/15/3580001/retail-middle-out-analysis/
"After decades as the dominant economic theory in American politics, trickle-down economics is starting to lose its grip on the debate. For evidence of that slippage, look no further than the business community’s own communications with investors.
Two thirds of the largest retail companies in the country say falling incomes for their customers threaten their business"