The share of total income going to the top one percent has increased from roughly eight percent in the 1960s to more than 20 percent today.
This is what the political scientists Jacob Hacker and Paul Pierson call the "winner-take-all economy." It is not a picture of a healthy society.
Such a level of economic inequality, not seen in the United States since the eve of the Great Depression, bespeaks a political economy in which the financial rewards are increasingly concentrated among a tiny elite and whose risks are borne by an increasingly exposed and unprotected middle class.
Income inequality in the United States is higher than in any other advanced industrial democracy and by conventional measures comparable to that in countries such as Ghana, Nicaragua, and Turkmenistan.
It breeds political polarization, mistrust, and resentment between the haves and the have-nots and tends to distort the workings of a democratic political system in which money increasingly confers political voice and power.It is generally presumed that economic forces alone are responsible for this astonishing concentration of wealth. Technological changes...have transformed the economy, making workers more productive and placing a premium on intellectual, rather than manual, labor. Simultaneously, the rise of global markets...has hollowed out the once dominant U.S. manufacturing sector and reoriented the U.S. economy toward the service sector...
Champions of globalization portray these developments as the natural consequences of market forces...
Skeptics of globalization, on the other hand, emphasize the distributional consequences...
But neither side in this debate has bothered to question
Washington's primary role in creating the growing inequality in the United States.
http://www.foreignaffairs.com/articles/67046/robert-c-lieberman/why-the-rich-are-getting-richer?page=show