Monopoly

"Schools tried to extend a radical monopoly on learning by redefining it as education. As long as people accepted the teacher's definition of reality, those who learned outside school were officially stamped 'uneducated.' Modern medicine deprives the ailing of care not prescribed by doctors. Radical monopoly exists where a major tool rules out natural competence. Radical monopoly imposes compulsory consumption and thereby restricts personal autonomy. It constitutes a special kind of social control because it is enforced by means of the imposed consumption of a standard product that only large institutions can provide".
--Ivan Illich, "Tools for Conviviality"