I would love to hear how they intend to enforce such a global minimum tax rate. As well how they would guarantee that no country offers a tax credit or otherwise to lower the numbers. And then, of course, there's the really common trick of keepin profits on the books near zero for a corporation to avoid taxes altogether. Would they suddenly be taxing income and not profit?
Never mind the international angle, what about the US states and localities offering business tax incentives to attract corporations?