What's going to happen when the money runs out for Medicare? A recently released report by the program's trustees found that within seven years Medicare taxes will fall short of Medicare expenses by more than 45%. What's more, Medicare and Social Security combined are on track to eat up the entire federal budget.

While the bulk of Medicare dollars comes from payroll taxes and beneficiary premiums, a large and growing share of Medicare expenses is borne by general taxpayers. And although the same law that created the new Medicare drug benefit also requires the president to propose remedial legislation, Congress is not required to actually do anything.