"The aftermath of the financial crisis is poised to bring a simmering fiscal problem in industrial economies to the boiling point", said the Swiss-based bank for central bankers -- the oldest and most venerable of the world's financial watchdogs. Drastic austerity measures will be needed to head off a compound interest spiral, if it is not already too late for some.

The risk is an "abrupt rise in government bond yields" as investors choke on a surfeit of public debt. "Bond traders are notoriously short-sighted, assuming they can get out before the storm hits: their time horizons are days or weeks, not years or decade. We take a longer and less benign view of current developments," said the study, entitled "The Future of Public Debt", by the bank's chief economist Stephen Cecchetti.