WITH DEBT soaring and the UK stuck in recession, Cameron and Osborne have few cards left to play. When the central pillar of economic policy starts to unravel, coherence and credibility soon follow. Prime ministers Callaghan (in 1976) and Major (in 1992) never recovered from the economic crises of these years. Is Cameron (2012) about to repeat the pattern? And what cards has he possibly left to play?