I think the way the sandwich works is the US entity pays huge royalties to the foreign entity for the use of their intellectual property. I might be wrong, but

I think the way the sandwich works is the US entity pays huge royalties to the foreign entity for the use of their intellectual property. I might be wrong, but I think that's how it works, and if it is, that means a lot of the money is not "earned outside their domicile" quite as much as you'd think.