and...
Looking further ahead, based on the US historical record, falls in income
concentration due to economic downturns are temporary unless drastic
regulation and tax policy changes are implemented and prevent income concentration from bouncing back. Such policy changes took place after the Great Depression during the New Deal and permanently reduced income concentration until the 1970s (Figures 2, 3). In contrast, recent
downturns, such as the 2001 recession, lead to only very temporary drops in income concentration (Figures 2, 3).
The policy changes that are taking place coming out of the Great
recession (financial regulation and top tax rate increase in 2013) are
not negligible but they are modest relative to the policy changes that took place coming out of the Great depression. Therefore, it seems unlikely that US income concentration will fall much in the coming years.
Here's the paper:
http://elsa.berkeley.edu/~saez/saez-UStopincomes-2011.pdf
and... a graph

http://www.motherjones.com/politics/2011/02/income-inequality-in-america-chart-graph[/url]
Are we witnessing the birth of America's Plutocracy?