The "second" insurgency, as termed by the U.S. government office charged with oversight of Iraqi expenditures, is the rampant corruption and mismanagement of funds. Check it:

A recent audit by his inspectors found that more than 14,000 guns paid for out of US reconstruction funds for Iraqi government use could not be accounted for. Many could be in the hands of insurgents or sectarian death squads, but it will be almost impossible to prove because when the US military handed out the guns it noted the serial numbers of only about 10,000 out of a total of 370,000 US-funded weapons, contrary to defence department regulations.

[snip]

A culture of waste, incompetence and fraud may be one legacy the occupiers have passed on to Iraq's new rulers more or less intact. Mr Bowen's office found that nearly $9bn in Iraqi oil revenues could not be accounted for. The cash was flown into the country in shrink-wrapped bundles on military transport planes and handed over by the ton to Iraqi ministries by the Coalition Provisional Authority (CPA) run by Paul Bremer, a veteran diplomat. The money was meant to demonstrate the invaders' good intentions and boost the Iraqi economy, which Mr Bremer later insisted had been "dead in the water". But it also fuelled a cycle of corruption left over from Saddam Hussein's rule.

So, next time you see that paycheck, and all of the taxes withheld, you can at least smile and know the money is really going to the right place.