Government alone cannot fully investigate all potential WTO cases. The U.S. private sector is deeply engaged in the problems caused by unfair trade practices, while the government is a step away. Companies do not do more because they have an incentive to be “free riders”—taking advantage of cases filed by the government or prepared by other companies. Companies that do help bring cases are acting on behalf of the U.S. government. So what’s good for GM is, in this case, good for the country.