Education is a low priority because teaching folks to think produces independent individuals who are troublesome to govern and become more difficult as government goes beyond a minimum. Much better just to provide basic tools to run the de-industrialized economy while building in the needed equality, groupthink, and conformity. Government wants sheep to herd, not educated, independent cats and government funds (with our taxes), and it operates the public schools. That's why neither Republicans nor Democrats have done anything about the schools, regardless of the fusses made. That is why the Republican and the Democrat running for Governor of New Mexico both oppose vouchers that would let parents select their schools, providing unwanted competition further opposed by the teachers' unions.
So then; do the schools that spend the most money produce the best students?