You only have to compete with foreign mega corps if you allow them to compete on their terms. Unlike smaller markets, the US is able to dictate terms and still have people lining up for access. If the price of admission is to play by the same rules that forced US companies to be broken up, then the smaller US corps, smaller foreign corps and foreign mega corps will all be competing on equal footing. Well, not really equal since US companies will always have the home team advantage.