The biggest political story of the year - David Cameron's involvement with the failed financial company Greensill - began as a scoop in The Financial Times. The newspaper has gained a reputation lately for its long-form investigations into poverty, deprivation and capitalist excess. But is there something inherently odd about the stockbroker's paper of choice taking on crusading topics? And how hard is it to take over the editorship of a newspaper already in rude health?Guest: Roula Khalaf, editor of The Financial Times.Studio engineer: Duncan HannantProducer: Hannah SanderPresenter: Amol Rajan