Nice try. I've seen how this goes over with those types.

The parents escalate to the adminstrators, who either involve the student counsellors or talk to the teacher directly. One of these two tell the teacher how they need to better support the student because they need a "little extra help" or can't handle the stress required to turn in homework assignments.

I wish this stuff worked, but these parents typically don't want an answer that requires their student to work harder (or differently). They want the curriculum, assignments, or grading scheme to change until their child gets an A - and they don't care about mastery.