Creditor countries are worrying about the safety of their money. That is what links two of the big economic stories of last week: Chancellor Angela Merkel's attack on the monetary policies pursued by central banks, including her own, the European Central Bank; and the pressure on Tim Geithner, US Treasury secretary, to persuade his hosts in Beijing that their claims on his government are safe. But are they? The answer is: only if the creditor countries facilitate adjustment in the global balance of payments. Debtor countries will either export their way out of this crisis or be driven towards some sort of default. Creditors have to choose which.

Germany and China have much in common: they have the world's two biggest current account surpluses, at $235bn and $440bn, respectively, in 2008; and both are also powerhouses of manufactured exports. They have, as a result, suffered from the collapse in demand of overindebted purchasers of their exports. So both feel badly done by. Why, they ask themselves, should their virtuous people suffer because their customers have let themselves go so broke?

Germany and China are also very different: Germany is a highly competitive global producer of manufactures. But it is also a regional power that has shared its money with its neighbours since 1999. Its problem is that its surpluses were offset by its neighbours' largely private excess spending. Now that the borrowers are bankrupt, their countries' domestic demand is collapsing. This is leading to a huge expansion in fiscal deficits and pressure for easier monetary policies from the ECB. So Ms Merkel is driven towards undermining the independence of Germany's central bank, in order to protect the still more vital goal of monetary stability.