Well, then you underestimate the inventiveness of Americans and don't understand the current system. Most of these corporations, whether it be American or Israeli, are already outsourcing their jobs to other countries. Sure, corporate offices are located here in the States, but the products are made elsewhere. Then when it comes to investment banks, it's just a matter of money switching hands, so no real wealth is created.
Our economy needs to produce stuff again. Since we allowed NAFTA and other agreements that allow companies to take jobs away from the homeland to arise, we are already in heaps of trouble. And those corporations are adding to the problem. So what we need is American companies producing American jobs and goods, not foreign firms that just have offices located in the states and shuffle money on various exchanges.