Types of fraud the FBI investigates include billing for services not rendered, "upcoding" reimbursable services, performing unnecessary services, adding tests to generate high fees, kickbacks and pharmaceutical drug diversion.

WSJ: Matthew Lifflander: The Economic Truth About Lying

Equally, it is wrong for politicians to demand money for services rendered or threats not carried through.

ECONOMIST: The bad and the not-so-bad in America's fundraising mess