"In 1975, the richest 1 percent owned 22 percent of America’s wealth. By 1992, they would nearly double that, to 42 percent":
www.spartacus.schoolnet.co.uk/JFKmockingbird.htm

U.S. has greatest inequality of wealth, wealth taxes in Europe:
www.multinationalmonitor.org/mm2003/03may/may03interviewswolff.html

U.S. billionaires more than doubled since '95 (129 to 292):
bostonreview.net/BR21.1/wolff.html
en.wikipedia.org/wiki/Category:American_billionaires