That sounds like a problem of people not understanding what middle class means. Its even worse than that, its a fairly basic part of history class when talking

That sounds like a problem of people not understanding what middle class means. Its even worse than that, its a fairly basic part of history class when talking about things like the American and French revolutions. If your biggest nitpick is that the author isn't using the phrase "middle class" incorrectly, then I don't see anything to complain about.