The economist has this article on financing terrorism and the use of measures such as proposed by the Financial Action Task Force on Fraud (FATF). Essentially those measures cost a lot of money and don't create any added value.
Which lead to the conclusion:
For KPMG's Mr Dillon, the resources already spent on the effort have handed a victory to the terrorists. “The cost to our global economy is so large, they've already had the effect they wanted,” he says. “The increasing costs of compliance and technology are a form of terrorism. We're damaging ourselves.”.
