You need to pay for school because it is a service offered to you. Such as dry cleaning. You don't want to pay for your clothes to be pressed, you don't drop them there. Same with education, you don't want to pay for a degree, don't attend school. That's why they call it "earning" your degree. But it seems as if the Education department is the only one earning. Self-education is still free. However, it will not be as valuable.