Britain's backlash against the bankers is gathering momentum. Political pressure has forced one bank chief to forego a hefty bonus; there are loud demands for a wider crackdown on stratospheric executive pay. Suddenly, politicians of all stripes are insisting that capitalism be 'responsible'. Stephen Sackur speaks to three in the industry - a leading fund manager, a long-time investment bank chief, and a former member of Britain's High Pay Commission. Can capitalism find a new moral compass?