Upchurch
Papa Funkosophy
Well, I think that's the point.At best, maybe you could argue for indentured servitude, since the compulsory part ends at age 16 or so. But again, the work done by the indentured servant, in this case, benefits the student. So it's the student working as an indentured servant for the benefit of...his older self, who will be in need of that diploma years later?
Unless you want to make a very weak argument that an educated populace benefits all of society, which it does, the only person who directly benefits from "compulsory" (and free) education is the student.
I'm not even sure how "compulsory labor" plays into it. The state only enforces that the student show up, not that they apply themselves or do homework. There is no law against flunking out.