I was a carpenter for the better part of my 20s. Definitely many stories like this that came up. The one that bothered me the most was how many times they looked at me silly for making a "bad" cut, when of course, I was making said cut because the area wasn't square. I had one guy get angry at me for making a frame that was visibly crooked, so I told him he should probably make it square and hang it up himself. When…
Using Fussell's class breakdown [1], it is likely that you haven't worked for any people in the "upper class"; you have met the several varieties of the middle class. Fussell's definitions of the class is more about their tastes and behaviors than about how rich they are. The upper classes would never get on their hands and knees and pound nails, because they feel that it is beneath them. The uppers are content with…
Looking at the book description, I take it that these are meant to be heuristics for guessing a random person's position in the class system? That seems more useful. I'm still not convinced it makes sense to apply that here, though, as the OP was working in these people's homes, and certainly has a very good idea what sort of people they were.