According to most economics and economic data the income gap between the rich and poor in the united states has grown since 1970 this means that a smaller percentage of americans control a larger percentage of wealth which of these is a contributing factor that explains this trend

AMERICANS do not go in for envy. The gap between rich and poor is bigger than in any other advanced country, but most people are unconcerned. Whereas Europeans fret about the way the economic pie is divided, Americans want to join the rich, not soak them. Eight out of ten, more than anywhere else, believe that though you may start poor, if you work hard, you can make pots of money. It is a central part of the American Dream.

The political consensus, therefore, has sought to pursue economic growth rather than the redistribution of income, in keeping with John Kennedy's adage that “a rising tide lifts all boats.” The tide has been rising fast recently. Thanks to a jump in productivity growth after 1995, America's economy has outpaced other rich countries' for a decade. Its workers now produce over 30% more each hour they work than ten years ago. In the late 1990s everybody shared in this boom. Though incomes were rising fastest at the top, all workers' wages far outpaced inflation.

Explanation:

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One Factor in the widening income divide is the decline of U.S. labor unions. As the share of the workforce represented by a union has declined to less than 11 percent since their peak in the 1940s and 1950s, those at the top of the income scale have increased their power to rig economic rules in their favor, further increasing income inequality.

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explanation:

i would say that the politicial parties from state to state varies.