Yes, radical teachers often refuse to grade students, because it reduces the quality of education. But many are forced to stop. Few have sufficient power to go

Yes, radical teachers often refuse to grade students, because it reduces the quality of education. But many are forced to stop. Few have sufficient power to go against the institution. (Not only do schools have their function to produce professionals who'll jump through hoops on command for a letter. But also some particularly career-oriented students may complain that this makes it harder for them to outrank other students. Students don't have that much power, but these students help the school build a case against the offending teacher.)