Huh? You want to ignore all factors relevant to the question except one (school quality), I try to introduce a second factor, and I'm oversimplifying?

Please go look up the definition of "simple".

I'm sure that's how you see it, but the fact is, that the OP posited the idea that unions were incompatible with a healthy education system. There are simply too many counter-examples to that.

Further, you've pushed the conversation into a discussion about race and class by way of an abstract hypothetical. From your posting history, I'm not really interested in having such a complex discussion with you.