The global financial system has become dangerously unstable and faces an avalanche of bankruptcies that will test social and political stability, a leading monetary theorist has warned. The situation is worse than it was in 2007. Our macroeconomic ammunition to fight downturns is essentially all used up," said William White, the Swiss-based chairman of the OECD's review committee and former chief economist of the Bank for International Settlements (BIS). "It will become obvious in the next recession that many of these debts will never be serviced or repaid, and this will be uncomfortable for a lot of people who think they own assets that are worth something," he told The Telegraph on the eve of the World Economic Forum in Davos. The warnings have special resonance since Mr White was one of the very few voices in the central banking fraternity who stated loudly and clearly between 2005 and 2008 that Western finance was riding for a fall, and that the global economy was susceptible to a violent crisis. Combined public and private debt has surged to all-time highs to 185pc of GDP in emerging markets and to 265pc of GDP in the OECD club, both up by 35 percentage points since the top of the last credit cycle in 2007. Mr White, who is also chief author of G30's recent report on the post-crisis future of central banking, said it is impossible know what the trigger will be for the next crisis since the global system has lost its anchor and is inherently prone to breakdown.