This is not about increasing tax revenue it is about preventing multinationals from evading taxes. It's similar in concept to the Alternative Minimum Tax, which was designed to prevent an ever-increasing web of exemptions and loopholes from allowing some people to pay little-to-no taxes.
Taxes aren't a virtue - they're a necessary evil. They're coercion, only paid on the threat of violence. We should be aiming to minimize taxes and fund programs through other voluntary means. So where the money is being spent should be considered when talking about how much should be raised, since it the cause.
Voluntary mechanisms only fill the needs of the wealthy, who also operate largely on coercive means(all that private property only exists by force of the government). At least taxes are by consensus, both in the amount, and what they find.
