A (long) rebuttal of the arguments in the Economists' recent feature on tax havens is now available here. As is noted by John Christensen, author of that critique:

It is quite astonishing that the word 'corruption' occurs only once in this 13,000-word survey of tax havens. Tax haven activities promote cross-border crime and corruption. Corruption has a demand side (money-launderers, tax evaders, kleptocrats, fraudsters, and their like); and a supply side: those who provide secrecy and sell the services that exploit it. The general strategy for fighting drug abuse by tackling both users and suppliers is equally applicable to the global struggle against corruption. While The Economist survey stops short of actively encouraging criminal activity, it does so indirectly, by actively advocating tax haven activities. In doing this, The Economist is indirectly encouraging cross-border crime, and corruption on a global scale.