The authors of the 2002 study go on to compare the situation in Finland with not only Norway but also Sweden, and they refer to another study that showed that over the study period (1999-2005) the amount of “unexplained” cash went from two-thirds of all cash in circulation up to four-fifths. … It’s difficult to avoid the conclusion that most (seriously: most) of the currency put into circulation by central banks is used for illegal purposes and, essentially, provides for a massive cross-subsidy from honest taxpayers to criminals.

Read more: http://digitaldebateblogs.typepad.com/digital_money/2010/07/cleaning-up.html