WASHINGTON, Oct 22 (Reuters) – The U.S. Treasury’s pay czar on Thursday slashed overall pay by more than half for top earners at seven companies that received massive taxpayer bailouts, and ordered that most of their salaries be paid in the form of long-term company stock. Kenneth Feinberg, charged with approving or renegotiating pay contracts for the 25 highest-paid employees at the seven banks and automakers, said their cash compensation for 2009 would drop by more than 90 percent compared to 2008.