But they do business where they need/want to do business, regardless of the tax situation. Complaining about taxes is just an attempt at leverage to get tax rebates/concessions/exemptions/etc or to structure the final holding company in a way that artificially shields profits so the executives can pay themselves larger salaries and bonuses.

Source: I was a former tax/legal advisor for a number of multinational companies. Out of a few hundred tax structurings, I can count on one hand the number of times that tax rate differentials affected material operational decisions.