Thank you, this exactly sums up the problem.
Our outward deportment reflects our inner state. As I said earlier, it isn’t a fashion show but an outward sign or respect that reflects the interior state. Additionally, dressing up is usually (typically) less comfortable which means that it also involves a sacrifice on our part to do something less comfortable. As one very wise Priest once put it, it is a way of taking tiny steps to bring our actions into conformity with our will. In a sense, it is a minor way of mortification through going outside our comfort zone.
The truth of the matter is that as our culture grows richer, our dressing grows sloppier. There’s no correlation between wealth and dressing nicely - you don’t need one to have the other. In fact the opposite has been shown to be true - in poorer countries, people tend to dress better. (Here’s a good article from the telegraph for more on this subject:
telegraph.co.uk/comment/columnists/charlesmoore/3561138/Now-we-can-afford-decent-clothes-why-do-we-not-wear-them.html).
The bottom line is that our culture has chosen comfort over looking nice and is hellbent and determined to fight for this “right” to look sloppy and casual with tooth and nail.
As Catholics, aren’t we called to be counter-culture? If so, step to it! This Sunday, why not don the skirt, tie the tie and leave the jeans at home for a day? Think of it not only as a outwardly reverent act but also a way to reclaim our culture from it’s slovenly decline.