Undoubtedly, I can see why China's doing it. It's utilitarian. College is already (wrongly) seen as "job training," and this will deepen that. But the number of jobs filled is one of many measures of "useful," and this threatens to make it the only one. Nobody can predict what will come of that. Telling people that they can only pursue a certain set of majors because they're useful, and if they don't like any of them, then too bad, seems a little nearsighted.