Did the meeting of the Group of 20 in London put the world economy on the path of sustainable recovery? The answer is no. Such meetings cannot resolve fundamental disagreements over what has gone wrong and how to put it right. As a result, the world is on a path towards an unsustainable recovery. An unsustainable recovery might be better than none, but it is not good enough.

This summit had two achievements: one broad and one specific.

First, “to jaw-jaw is better than war-war”, as Winston Churchill remarked. Given the intensity of the anger and fear loose upon the world, discussion itself must be good.

Second, the G20 decided to treble resources available to the International Monetary Fund, to $750bn, and to support a $250bn allocation of special drawing rights (SDRs) – the IMF’s reserve asset. If implemented, these decisions should help the worst-hit emerging economies through the crisis. They also mark a return to a big debate: the workings of the international monetary system.

This is the point at which the eyes of countless readers will glaze over. It is easier for most to believe that the explanation for the crisis is solely the deregulation and misregulation of the financial systems of the US, UK and a few other countries. Yet, given the scale of the world’s macroeconomic imbalances, it is far from obvious that higher regulatory standards alone would have saved the world.

This is not just a matter of historical interest. It is also relevant to the sustainability of the recovery. Fiscal deficits are now generally far bigger in countries with structural current account deficits than in those with current account surpluses. This is because the latter can import a substantial part of the stimulus introduced by the former. The Organisation for Economic Co-operation and Development forecasts a jump in US public debt of almost 40 per cent of gross domestic product over three years (see chart). It is quite likely, therefore, that the next crisis will be triggered by what markets see as excessive fiscal debt in countries with large structural current account deficits, notably the US. If so, that could prove a critical moment for the international economic system.
  
  
Financial Times