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It was one of those moments that can only happen in a place like Davos. There I was last week, having a coffee and minding my own business, when from a nearby table I heard a desperate voice. I assumed it belonged to a beleaguered bank executive, or a stricken hedge fund manager. “We are doing everything we can,” he said, “but the markets don’t care.”

I looked up and realised the voice belonged to the Greek prime minister. His arms crossed defensively, George Papandreou was now listening as one of the world’s top economists told him he thought his best bet was to seek an emergency bail-out from the International Monetary Fund.