What's behind low productivity and flatlining pay?

Newsnight interviews Andy Haldane, Chief Economist of the Bank of England on the contributory causes of the flat-lining of pay over the last ten years. Why has productivity stalled? Haldane argues that perhaps only 5 per cent of firms are taking the "productivity high road" whereas the UK economy suffers from a long tail of relatively inefficient firms whose productivity is low and who cannot afford to pay people more.