Before our political leaders get too fancy remaking capitalism next month at the Bretton Woods II summit in Washington, they should attend to urgent business. Since the closure of Lehman Brothers triggered a global banking panic, political leaders in the US and Europe have successfully thrown a cordon round their banks to prevent financial meltdown. What they have not done yet is to co-ordinate macroeconomic policies to stop a steep global downturn. This is the urgent agenda.

A US downturn will not be avoided. US households cannot continue to spend more than their income as they have in recent years, even if the credit crunch eases. Household consumption is bound to fall steeply. The writedowns in US household wealth from the reversals in housing and equities will probably reach $15,000bn (€12,000bn, £9,700bn) and the resulting steep decline in private consumption and investment could reach about one-tenth of that amount.