Original sentence: Further, payroll tax receipt surpluses are considered part of the total tax revenue base of the federal government, effectively reducing the reported budget deficit relative to what it would be if social security were accounted for separately.It is this latter amount that is often reported in the media.Social Security trust fund amounts have been borrowed and spent and are a component of the national debt.The national debt increased approximately $1,017 billion in 2008, which is the $638 billion on-budget deficit plus an additional $379 billion of supplemental appropriations or otherwise non-budgeted expenditures, primarily the Economic Stimulus Act of 2008, the wars in Afghanistan and Iraq and earmarks.The total federal deficit is the sum of the on-budget deficit (or surplus) and the off-budget deficit (or surplus).These include Social Security, special appropriations, and earmarks.Using 2008 as an example, the "On-Budget" deficit of $638 billion is reduced by the "Off-budget" surplus of $183 billion to arrive at the "Total" deficit of $455 billion.While intuitively the deficit and annual change in debt amounts would be equal, there are key structural differences in the two measures
Edited sentence: "  The total federal debt is divided into "intergovernmental debt" and "debt held by the public."  The total federal deficit is the sum of the on-budget deficit (or surplus) and the off-budget deficit (or surplus).For example, in FY2008 an off-budget surplus of $183 billion reduced the on-budget deficit of $642 billion, resulting in a total federal deficit of $459 billion.In large part because of Social Security surpluses, the total federal budget deficit is smaller than the on-budget deficit.Media often report the latter figure.Social Security and other federal trust funds are part of the "intergovernmental debt.The national debt increased by $1,035 billion between the end of FY2007 and the end of FY2008.The surplus of Social Security payroll taxes over benefit payments is invested in special Treasury securities held by the Social Security Trust Fund.While the difference between the deficit and the annual change in debt has been small, some extraordinary actions taken in FY2008 and FY2009 (such as the federal conservatorship of the mortgage guarantee agencies Fannie Mae and Freddie Mac) have led to a divergence between the deficit and the increase in federal debt