The west faces a lost decade of economic stagnation. Unemployment is high, inequality is rising and governments are broke. Should we be blaming capitalism or looking to the market for solutions?HARDtalk’s Stephen Sackur speaks to Sir Ronald Cohen, one of Britain's most innovative business leaders. He is a pioneer of venture capitalism who is now committed to the idea of social investment, or capitalism with a conscience. Can the private sector combine a commitment to profit and the public good?