A crucial report into the collapse of disgraced energy giant Enron has discovered the firm's executives bribed tax officials. The energy giant - once the US' seventh largest firm - paid no income tax between 1996 and 1999 according to the investigation by the Senate Finance Committee. The outraged committee's chairman, Charles Grassley, described a week-long programme of wining and dining, tennis, fishing and golf as part of Enron's strategy to get its own way. Grassley also said the report called into serious doubt the ethics of tax advisers and the "desperate" bankers, accountants and lawyers who helped Enron. "The report reads like a conspiracy novel, with some of the nation's finest banks, accounting firms and attorneys working together to prop up the biggest corporate farce of this century," he said.