Makes up the biggest percentage. usgovernmentspending.com/usgs_piecol.php?title=Federal Spending&year=2011&sname=&units=b&label=Pensions_Health Care_Defense_Welfare_Other&fed=787.633_898.002_928.479_464.588_755.158 http://www.usgovernmentspending.com/budget_pie_gs.php