The difference would be that we wouldn't look down upon different jobs, but realize how necessary each person is to the big picture. And, each person would take pride in the work they do, utilizing those skills taught that are necessary for success. I like your son's idea. Maybe by fewer unwanted pregnancies, each child would be treasured and their educational needs fostered. They would, in turn, see more educational successes.
Education does work.
I have yet to see a person who wanted to be educated fail in that task. Some people expect indoctrination rather than education. Among other advantages of course. Everyone wants respect and the right to the same rights and privileges that so many take for granted. I found your question very interesting.