From The Economist:
CIVILISATION works only if those who enjoy its benefits are also prepared to pay their share of the costs. People and companies that avoid tax are therefore unpopular at the best of times, so it is not surprising that when governments and individuals everywhere are scrimping to pay their bills, attacks are mounting on tax havens and those that use them.
The archetypal tax haven may be a palm-fringed island, but as our special report this week makes clear, there is nothing small about offshore finance. If you define a tax haven as a place that tries to attract non-resident funds by offering light regulation, low (or zero) taxation and secrecy, then the world has 50-60 such havens. These serve as domiciles for more than 2m companies and thousands of banks, funds and insurers. Nobody really knows how much money is stashed away: estimates vary from way below to way above $20 trillion.
Read more: Tax havens: The missing $20 trillion