The Jones Act is bad because it's a bandaid on a more serious wound. Repeal the Jones Act, let what remains of American shipbuilding die, and maybe then someone will try to fix it. Right now the Jones Act just lets people point at the remaining American shipbuilders and say "see? They're viable with our current strategy! We just need to do more!" The only reason the current strategy has any life in it at all is because of the Jones Act; otherwise, it's not viable at all.