> More expensive clothes are usually less durable

I have nothing to back that up, but I wouldn't be surprised if this is a feature. If these luxury items are being used by the society (or at least in some circles) as a proxy for 'success'(ie having enough disposable money) it probably would be better if they we also quite fragile. This way you could distinguish between someone who received a expense gift vs someone that has money to always keep buying new items.

I'm not sure how real it this, but I've read somewhere that part of the appeal of expensive glassware was the fact that it was pretty fragile. Serving someone at your house with expensive glassware was a way to tell 'look how much money I've got'.

Just to be clear, I don't think we should get impressed/try to impress people by how much money someone has. But that is a practice as old as time, and it doesn't seem to be going away any time soon.