See this article about the effects of automation on manufacturing. What is the future of manufacturing jobs when robots cost a third of a human?
Boston Consulting Group reports that it costs barely $8 an hour to use a robot for spot welding in the auto industry, compared to $25 for a worker—and the gap is only going to widen. More generally, the “job intensity” of America’s manufacturing industries—and especially its best-paying advanced ones—is only going to decline. In 1980 it took 25 jobs to generate $1 million in manufacturing output in the U.S. Today it takes five jobs.