... to act as an early warning system.
Wasn't he listening to these warnings:
December 2003 IMF gives Brown borrowing warning
September 2005 IMF report Warning over £1 trillion mountain of debt
September 2005 Brown besieged over growth and borrowing plans
December 2005 IMF fires new warning over Britain's finances
September 2006 IMF warns over UK property crash
October 2007 IMF report UK house market is 'heading for crash'
April 2008 IMF: UK vulnerable to US-style housing slump