The deterioration in the public schools came after the 60's radicalism sprung from the colleges. The rich only want workers who are technically competent, not really able to criticaly think. The media allow "free speech" and debate about hot button social issues like abortion, while making sure any real study of the finacial workings of our society are a mystery to the average person.
Look for books on consitutional law and history in your local public library. 70 years ago they were a features shelf of books. Friends of mine are collecting them from estate sales. Look for them in the book stores. It is not a lack of demand, it is a deliberate effort to dumb down Americans to their rights. It not taught in the schools either. When the average american can not say what is in the constitution, he won't camplain if it is violated.