Rather than looking at absolute numbers, it might be better to look at the ratio of debt/GDP. The worrying thing is, this has been going up as well over the years.
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The fiscal gap is a comprehensive measure of a government's total indebtedness. Proposed by economists Laurence Kotlikoff and Alan Auerbach, it is defined as the difference between the present value of all of government's projected financial obligations, including future expenditures, including servicing outstanding official federal debt, and the present value of all projected future tax and other receipts, including income accruing from the government's current ownership of financial assets.[1] This method can be used to calculate the percentage of necessary tax increases or spending reductions needed to close the fiscal gap in the long-run.
i found an article from Laurence Kotlikoff
For the EU as a whole, the fiscal gap is 2.4 percent.
That’s sizeable, but it pales in comparison to the current U.S. fiscal gap of 10.5 percent.
It’s a strange world in which a totally bankrupt country — the U.S. — can borrow at extremely low cost while printing money at astronomical rates.
It’s a strange world in which policymakers can’t distinguish economic from linguistic measures of fiscal sustainability.
And it’s a strange world in which Italy, the developed world’s most fiscally responsible country, has to be lectured on fiscal prudence by countries in far worse fiscal shape.
http://www.pbs.org/newshour/making-sense/whats-the-most-fiscally-responsible-country-in-the-developed-world/