The Taxpayer Assistance and Simplification Act (H.R. 5719) approved by the House Ways & Means Committee yesterday contains a measure that would force U.S. firms employing workers through foreign shell companies to pay Social Security and Medicare taxes if the work is performed under a contract with the federal government. The provision's language is lifted from the Fair Share Act of 2008 (H.R. 5602), which was introduced in the Senate and House on March 13. The measure would bring in, over ten years, $846 million in new revenue. See this Watcher piece for more details on the Fair Share Act of 2008.