Income of $34,000 after tax puts you in the world richest 1%, 50% of these people from US
An after tax income of $34,000 will put you in the world's richest 1% [Look for this in Branko Milanovic's actual book- see citation below]
"So by global standards, America's middle class is also really, really rich. To make it into the richest 1 percent globally, all you need is an income of around $34,000, according to World Bank economist Branko Milanovic."
Branko Milanovic, The Haves and the Have-Nots: A Brief and Idiosyncratic History of Global Inequality, (New York: Basic Books, 2011), page.
Charles Kenny, "We're All the 1 Percent," Foreign Policy, February 27, 2012, accessed October 24, 2014, http://www.foreignpolicy.com/articles/2012/02/27/we_are_all_the_1_percent.