Here's another angle on the Top 1% income earners. The study was mentioned in a New York Times Op-Ed piece by David Brooks.
UPDATE: Paul Krugman has a rebuttal (sort-of). David Brooks concludes it as an 'educated vs non' class difference but Paul Krugman claims that old argument is nothing more than obfuscation of the truth. His New York Times piece here. He also says that it's not really the 1%, it's the 0.1% (one-tenth of the 1%). The data source I have referenced also includes the 0.1% data, so if anyone would care to visualize it in Tableau Public please let me know.
( CLICK ON THE TABS OR ARROWS TO VIEW THE WORKBOOK )