You probably already know about the report, commissioned and then suppressed by the Bush administration, that (as Reuters says), "measured the present value of the federal deficit at over $44 trillion."
Just in case you're not clear how much money that is, that's $160,000 for every man, woman, and child in the U.S.
(The U.S. population is roughly 275 million.)
And, as Reuters notes,
The study estimated that closing the budget gap would take an immediate and permanent across-the-board tax increase of 66 percent, the paper reported.