I think zero tax is a great way to jump-start an economy. But, the CEO also has a great deal of risk when owning a lot of corporations in new countries. They are less stable in the number one asset, and that is employees. They have underdeveloped systems to produce those workers as well. But, I think it's entirely fair to charge taxes in more balanced countries with no shortages.
I think taxes might also lead to better corporate practices as corporations have to put more effort into profit making. Allowing the corps to sit on auto without any intervention won't turn as large of a profit, so it encourages more play time which in turn makes the game more engaging.
Thus, we can conclude that taxes are fun.