[1] Overall tax rates, taking total tax revenue as percentage of GDP. Some specific tax rates are lower or higher, though overall they trend higher.
Also, it's worth mentioning this is referring to where corporations are set up - not people.
But apart from that I agree, companies will shop for the best tax regimen possible.
You see that question only works if the costs salaries of the accountants, the cost of a 'presence' in some foreign country, and other rules is more than offset by the savings in tax rate. It is easy to budget since its an annual thing, plan A we pay $X, plan B we pay $Y, select plan in (A, B) where the tax is lowest.
What it means, in the absence of some pretty crazy laws, is that there is a ceiling on taxes.
Wouldn't any amount above 0% be reason for a company to seek tax havens? With revenues in the billions, it seems like even a 1% tax rate would be more expensive than the cost of relocating that money.