There is no easy way out of this tangle. But Mr White said it would be a good start for governments to stop depending on central banks to do their dirty work. They should return to fiscal primacy - call it Keynesian, if you wish - and launch an investment blitz on infrastructure that pays for itself through higher growth.

"It was always dangerous to rely on central banks to sort out a solvency problem when all they can do is tackle liquidity problems. It is a recipe for disorder, and now we are hitting the limit," he said.

World faces wave of epic debt defaults, fears central bank veteran