from the Committee on Government Reform Minority Office
: Under the Bush Administration, the “shadow government” of private companies working under federal contract has exploded in size. Between 2000 and 2005, procurement spending increased by over $175 billion dollars, making federal contracts the fastest growing component of federal discretionary spending. ... Federal spending on Halliburton contracts increased over 600% between 2000 and 2005.
If you're short on time, read the one-page summary
of the report, or just hit the database of problem contracts