America's fixation on the “China problem” is now boiling over. From Google to the renminbi, China is being blamed for all that ails the US. Unfortunately, this reflects a potentially lethal combination of political scapegoating and bad economics.

The political pressures are grounded in the angst of American workers. After more than a decade of stagnant real compensation and, more recently, a sharp upsurge in unemployment, US labour is being squeezed as never before. Understandably, voters want answers. It is all because of the trade deficit, they are told – a visible manifestation of a major loss of production to foreign competition. With China and its so-called manipulated currency having accounted for fully 39 per cent of the US trade deficit in 2008-09, Washington maintains that American workers can only benefit if it gets tough with Beijing.

However appealing this argument may seem, it is premised on bad economics. In 2008-09, the US had trade deficits with over 90 countries. That means it has a multilateral trade deficit. Yet aided and abetted by some of America's most renowned economists, Washington now advocates a bilateral fix – either a sharp revaluation of the renminbi or broad-based tariffs on Chinese imports.