”Because contractors were paid on cost-plus arrangements, they had a powerful incentive to spend to the hilt. The undisputed master of milking the system is KBR, the former Halliburton subsidiary so ubiquitous in Iraq that soldiers even encounter its customer-survey sheets in outhouses. The company has been exposed by whistle-blowers in numerous Senate hearings for everything from double-charging taxpayers for $617,000 worth of sodas to overcharging the government 600 percent for fuel shipments. When things went wrong, KBR simply scrapped expensive gear: The company dumped 50,000 pounds of nails in the desert because they were too short, and left the Army no choice but to set fire to a supply truck that had a flat tire. “They did not have the proper wrench to change the tire,” an Iraq vet named Richard Murphy told investigators, “so the decision was made to torch the truck.