I could only use 428 words, but I highlighted the main arguments for tax havens and tax competition in a “Room for Debate” piece for the New York Times.
I started with the economic argument.
[T]ax havens are very valuable because they discourage anti-growth tax policy. Simply stated, it is very difficult for governments to impose and enforce confiscatory tax rates when investors and entrepreneurs can shift their economic activity to jurisdictions with better tax policy. Particularly if those nations have strong policies on financial privacy, thus making it difficult for uncompetitive high-tax nations to track and tax flight capital. Thanks to this process of tax competition, with havens playing a key role, top personal income tax rates have dropped from an average of more than 67 percent in 1980 to about 42 percent today. Corporate tax rates also have plummeted, falling from an average of 48 percent to 24 percent.
…Lawmakers also were pressured to lower or eliminate death taxes and wealth taxes, as well as to reduce the double taxation of interest, dividends and capital gains. Once again, tax havens deserve much of the credit because politicians presumably would not have implemented these pro-growth reforms if they didn’t have to worry that the geese with the golden eggs might fly away to a confidential account in a well-run nation like Luxembourg or Singapore.
Since I didn’t have much space, I couldn’t go into much greater detail. Below the jump is a video that elaborates on the economic benefits of tax havens, including an explanation of why fiscal sovereignty is a big part of the debate.