US hedge fund bosses threaten to move to Britain • Billionaires battle against threat of regulation • Soros says he would happily pay income tax America's top hedge fund managers staunchly defended the conduct of their secretive, high-risk industry yesterday and warned Congress that knee-jerk regulation could push financial jobs across the Atlantic to London. In a rare day of public scrutiny, the billionaire bosses of five leading hedge funds appeared before the house oversight committee to answer charges that their unregulated bets on financial markets have destabilised the global economy. George Soros, Kenneth Griffin, Philip Falcone, Jim Simons and...