Stephen Sackur talks to newsmakers and personalities from across the globe. Is there anybody who really understands what is happening to the global economy? As the financial crisis threatens to morph into a global slump, banks, regulators and governments stand accused of ignorance, incompetence and worse. Jim O'Neill was, in the good times, hailed as a rock star of economic forecasting and earned his bank, Goldman Sachs, mega-profits. Stephen Sackur asks him whether banking big-shots have any credibility left in the current bleak climate.