This only happens in highly competitive markets like say, cotton t-shirts, gasoline, or wheat. It is not like Facebook is now going to have charge more for a social media account to stay afloat among a sea of other social media companies. No, Facebook (and Google, etc) will have to pay their corporate tax like they should. Although I think the new US corporate tax code is already going to prevent the current evasion schemes until, of course, new ones are invented.
