Link?
That cannot be right. Off hand this was the first link I could find. From 2007 though.
http://finance.yahoo.com/news/pf_article_102817.html
Under Social Safety Net section
"All types of aid to the needy -- Medicaid, housing subsidies, aid to poor families with children (welfare, which accounts for about 1 percent of the budget), food stamps, school lunches and so on, plus unemployment benefits -- account for about 16 percent of the budget."