In 2002 the GOP allowed the PAYGO requirements passed in the Omnibus Budget Reconciliation Act of 1993 and the Balanced Budget Act of 1997 budget bill plus the protections for the SSA trust fund to expire.
Total Federal spending as a percentage of GDP decreased each year from FY1991 through FY 2000, falling from 22.3% to 18.4%
PAYGO statute expired at the end of 2002. After this, the GOP Congress enacted Bushs 2003 tax cuts Jobs and Growth Tax Relief Reconciliation Act of 2003, Medicare Prescription Drug, Improvement, and Modernization Act
BTW the Medicare prescription drug benefit did not meet the PAYGO requirements.
Oh lets not forget the failed Economic Stimulus Act of 2008.
So after the surplus was spent...SSA payed for and is paying for Bushes tax cut medicare drugs and the first stimulus in 2008
Simple.