Trying to explain concepts like basic economics to a leftist is a lot like trying to point out something to your cat. You can say "hey look over there" and point, and the cat will stare at your finger. Unfortunately that is about the same effect basic economics will have on your average "educated" leftist. The eyes glaze over, the confusion sets in, and then they call you some sort of -ist or -phobe and storm off in smug self-righteousness. Honestly, talking to the cat is probably less annoying.