GovExec.com is reporting that the news in government circles is that a Government Accounting Office audit shows that "U.S. defense contractors failed to pay the federal government billions in taxes and, in some cases, may be guilty of criminal offenses."
"More than 27,000 defense contractors owe the federal government about $3 billion in unpaid taxes as of September 2002" There's plenty of specific detail at the link above, if you've got the stomach for it. The GAO audit report is actually titled (and you gotta love it!), "DoD Contractors Abuse the Federal Tax System with Little Consequences."
"Little Consequences" ... the fitting epitaph on the last three hair-raising years.