Lower costs should not be the grand design of an economic system. Different countries have different wage scales. To lose an entire industry, as happened when Japanese-made TV sets became the overwhelming choice of Americans, may have resulted in lower-cost and higher-quality products, but it was not a free ride. The market turnaround drove more American workers into lower-paying service jobs, thereby lowering living standards and assuring a less skilled work force in the future.
There is nothing fundamentally wrong with paying more for a product if the higher price is beneficial to society at large. Despite the bleak warnings of the free traders, if a trade war keeps a substantial number of people, one's own people, from losing jobs, then the war should be fought. Trade wars enable people to develop their own talents and resources--at a price, of course, and generally at a higher price. But the alternative may be the dispersal of the country's production facilities and production skills to countries with lower wage scales. Should a Western worker be forced out of a good job at a microchip manufacturing plant and be compelled to find employment in a fast-food eatery because Korean computer firms pay their one-fifth of what his American counterpart takes home?
Assume that a $75 foreign watch is slightly better than a $100 one made in the United States. If people are willing to put their fellow citizens out of work to save $25 on a watch, their country, sooner or later, will lose much of its export trade to foreign nations that offer lower prices, not just for watches, but for hundreds of other products. Eventually this drain will seriously threaten any country's economic health.
Free trade in its worse aspects multiplies inequalities and deprives citizens of country A of the opportunity of being employed in industries manufacturing a product that has become a monopoly of country B, which has a much lower wage scale and which may even have copied or stolen the product from Country A. People thrown out of work in country A are not casualties of trade war; they are casualties of trade peace.