oh come on... if you have an offshore corporation in Ireland, that acts as a selling agent to the US corporation and hence generates all the profits they never come back to US. 0 tax are paid on that.
When you have a second look at 10-k filing of MSFT, GOOGLE, Apple, GE, CAT, or any other multinational.

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Человек, который почувствовал ветер перемен, должен построить не щит от ветра, а ветряную мельницу