I really don't know on this. I hated wearing uniform at school - but we all had to, so it sort of leveled people. But the cost was quite significant (we were not wealthy, but also, not poor. So we managed it for all 3 of us).
But OTOH, I didn't have much to wear other than uniform. I was a very introvert kid (you would never believe it now, would you). And I never really had a social life outside school. So I have clothes to wear, but I did actually - secretly - like not having to make decisions about what to wear.
I think my parents would have appreciated it if I could have worn jeans, as they might last longer than the uniform trousers.