the argument you hear from free marketers is that supply management inflates prices, but it's largely garbage.
abolishing supply management will lead to higher profits for the bourgeois layer, which is why they want to do it, and it will help american farmers, but it won't reduce prices; don't let the free market fundamentalists trick you into thinking it will.
market theory just simply doesn't describe the reality we live in, and you're not going to get much of anywhere trying to apply it to get meaningful results. all that following market theory will do is mislead you into making bad policy decisions.
the liberals are supposed to do better than this