Much of the public focus is on the nation's public debt, which is $14.3 trillion. But that doesn't include money guaranteed for Medicare, Medicaid and Social Security, which comes to close to $50 trillion, according to government figures.

The government also is on the hook for other debts such as the programs related to the bailout of the financial system following the crisis of 2008 and 2009, government figures show.

Taken together, Gross puts the total at "nearly $100 trillion," that while perhaps a bit on the high side, places the country in a highly unenviable fiscal position that he said won't find a solution overnight.

"To think that we can reduce that within the space of a year or two is not a realistic assumption," Gross said in a live interview. "That's much more than Greece, that's much more than almost any other developed country. We've got a problem and we have to get after it quickly."

Gross spoke following a report that US banks were likely to scale back on their use of Treasurys as collateral against derivatives and other transactions. Bank heads say that move is likely to happen in August as Congress dithers over whether to raise the nation's debt ceiling, according to a report in the Financial Times.

The move reflects increasing concern from the financial community over whether the US is capable of a political solution to its burgeoning debt and deficit problems.