Dramatic tax revenue declines--producers strike?

From the Associated Press:

"Tax receipts are on pace to drop 18% this year, the biggest single-year decline since the Great Depression, while the federal deficit balloons to a record $1.8 trillion. Other figures in an Associated Press analysis underscore the recession's impact:

"Individual income tax receipts are down 22% from a year ago.
Corporate income taxes are down 57%.
Social Security tax receipts could drop for only the second time since 1940
Medicare taxes are on pace to drop for only the third time ever.

http://taxprof.typepad.com/taxprof_blog/2009/08/tax-revenues.html