I was under the impression that (actual) communist educational systems were geared predominantly toward the most advanced students, rather than the other way around. Cranking out prizewinning physicists, mathematicians, and chess grand-masters at a somewhat greater than expected rate.
Not "educational communism" in the sense of educational systems modeled on those of communist countries.
The analogy is from "if I can't afford a car, then nobody should be allowed to have a car" to "if I can't understand algebra, then nobody should be allowed to learn algebra".
Read about Spivak's Calculus.
Michael Spivak is an American mathematician born in Queens, New York.
Your point reminds me of an experience I had in grad school. A good friend in the program was from (communist) Romania. We were both looking at the weekly math challenge that one of our professors posted in the hallway. It was something like construct with compass and straightedge the eight circles that are tangent to all three given (arbitrary sized and positioned) circles.
I was good at geometry in school, very good, head and shoulders above my fellow students. I really had no idea how to solve the problem and was fumbling around with it when I Romanian friend took a look and knew the correct approach immediately. It involved an isomorphic mapping of the circles into some alternate collection of straight line segments, solving the problem in that space, and then inverting the isomorphism (I think. It was many years ago--before the fall of the Berlin Wall). His high school training in geometry was clearly much deeper than mine was.