People, especially those on the Left, often lazily argue against certain markets by asserting, without good evidence, that the market in question will be (behave as if it were) monopsonistic or monopolistic, and thus allow some to exploit others. (I’m looking at you, Marx. Read some real econ and take a shower while you’re at it.) Usually they have no evidence for this claim. But even in the uncommon cases where they do identify such monopsonies or monopolies, the solution isn’t obviously to forbid a market, but to do things to break up the monopsony or monopoly.