[USA] Misuse of Government Purchase Cards / Congressional Research Service, 30 July 2008
PDF - http://assets.opencrs.com/rpts/RL34602_20080730.pdf
"Since the mid-1990s, the use of government purchase cards has expanded at a rapid rate. Spurred by legislative and regulatory reforms designed to increase the use of purchase cards for small acquisitions, the dollar volume of government purchase card transactions grew from $527 million in FY1993, to $18.7 billion in FY2007. While the use of purchase cards has been credited with reducing administrative costs, audits of agency purchase card programs have found varying degrees of waste, fraud, and abuse..."