In The Know: Are America's Rich Falling Behind The Super-Rich?
Although this is a brilliant parody from the Onion, the premise is true.
If you take look at this graph of the top 5% (comparing the top 1% to the next 4%) and this graph of Top 1% (comparing the top 0.1%, the next 0.4%, to the lower 0.5%), you can see how the richer you are the more your share of the total income in the US has increased since the 1970s.
