Because that goes right to the fundamentals of what each government sees as best for its people and keeping its country in balance. For example, you take a country like Denmark--very high personal tax rates, but not high corporate tax rates, so it does get a considerable amount of foreign investment.
The other side of that coin is the Danish minister came to me and said their tax rates were the same as the United States. I had the sheet in front of me that showed they were only second to Sweden. I asked how he established that. He said if you live in the United States and you're a middle-income earner who wants to send your kids to university, you have to pay for it; you want to have health care, you pay for it. He said you add up all of that and in Denmark we pay for it, so at the end of the day the amount of disposable income left over for other purposes is the same; and he had a chart to show this. I thought that was very interesting, but I pointed out to him that the American did have a choice.
That's why I say you can't have uniform tax rates. Every country will have its own particular approach.