Adam Posen - Bank of England policy maker

Serious questions are being asked about the competence of economic policy makers in the western world. In the face of unsustainable debt, dwindling growth, rising unemployment and a banking crisis, have the responses been adequate to the challenge? Adam Posen is about to retire as one of the independent members of the Bank of England's Monetary Policy committee, Stephen Sackur asks why managing the world's richest economies is proving so difficult.