“Americans are more and more aware that Social Security contributions are not “invested” to finance future benefits; instead, they are used to disguise the true amount of borrowing necessary to fund the Administration’s unprecedented spending spree. As the General Accounting Office stated last September: ‘The present situation, in which trust fund surpluses are combined with and partially offset a deficit in the general fund, means that the payroll tax is being used, not to make provision for future retirement benefits, but to pay for today’s general operations of government.’”