Part of the problem with American companies competing with the rest of the world on supposedly equal footing is American companies have to pay their sailors and abide by workplace regulations that Chinese/etc shipping can ignore. In other words it's not equal footing, it can't be equal footing, and America should stop pretending that competing on equal footing with shipping companies that use slave labor would even be a good thing. Subsidies are necessary, the libertarians who hate that can get bent.