Claim: Historically, the Social Security tax has been assessed on about 90% of U.S. income. Now it captures 83% because there's been such a growth of income among the highest earners.
Fact-check: U.S. Rep. David Cicilline says only 83 percent of income is subject to Social Security tax, down from about 90 percent historically 
Verdict: barely-true
Organisation: PolitiFact
Author: C. Eugene Emery Jr.
Date published: 2013-05-19T00:00:00