Study: Income Inequality Kills Economic Growth

From Mother Jones:

So how important is equality? According to the study, making an economy’s income distribution 10 percent more equitable prolongs its typical growth spell by 50 percent. In one case study, Berg looked at Latin America, which is historically much more economically stratified than emerging Asia and also has shorter periods of growth. He found that closing half of the inequality gap between Latin America and Asia would more than double the expected length of Latin America’s growth spells. Increasing income inequality has the opposite effect: “We find that more inequality lowers growth,” Berg says.

Berg and Ostry aren’t the first economists to suggest that income inequality can torpedo the economy. Marriner Eccles, the Depression-era chairman of the Federal Reserve (and an architect of the New Deal), blamed the Great Crash on the nation’s wealth gap. “A giant suction pump had by 1929-1930 drawn into a few hands an increasing portion of currently produced wealth,” Eccles recalled in his memoirs. “In consequence, as in a poker game where the chips were concentrated in fewer and fewer hands, the other fellows could stay in the game only by borrowing. When the credit ran out, the game stopped.”

Many economists believe a similar process has unfolded over the past decade. Median wages grew too little over the past 30 years to drive the kind of spending necessary to sustain the consumer economy. Instead, increasingly exotic forms of credit filled the gap, as the wealthy offered the middle class alluring credit card deals and variable-interest subprime loans. This allowed rich investors to keep making money and everyone else to feel like they were keeping up—until the whole system imploded.