This problem is not specific to China, it's a problem of going with the lowest priced supplier. Your proposed recourse presumes that the supplier is making enough money on the deal to engage in a contract with teeth... many are not. Also, even if they moved everything to the U.S. they'd likely have different flavors of the same types of issues (i.e. did the NSA embed someone in the company to implant backdoors etc.) Fraud, sabotage and espionage aren't confined to specific countries. When greed drives you to move operations to the absolute cheapest places you can find on Earth, that's not going to be without its own set of risks and problems.