Inside the vast, glass-walled Queen Sirikit conference centre in Bangkok, the air-conditioned atmosphere was calm as policymakers from more than 100 countries gathered this week for the International Monetary Fund’s annual meeting – and contemplated the surprising strength of the global economy.

A small army of smiling, uniformed Thai staff were on hand to explain the baffling geography of the heavily guarded building, where lunch options were as cosmopolitan as the delegates – including, improbably, a Burger King.