H.R.5602 - Federal Government - To amend the Internal Revenue Code of 1986 and the Social Security Act to treat certain domestically controlled foreign persons performing services under contract with the United States Government as American employers for purposes of certain employment taxes and benefits.

Fair Share Act of 2008 - Amends the Internal Revenue Code and title II (Old Age, Survivors, and Disability Insurance Benefits) of the Social Security Act to treat certain foreign subsidiaries of U.S. companies performing services under a contract with the U.S. government as U.S. employers for purposes of Social Security and Medicare employment taxes.