But that pricing gap is almost entirely uncoupled from material cost.
They make them by hand (by choice), and of course use the best materials, but a cashmere shirt at H&M is very cheap. Brands are priced out of reach of common folk, but materials and types of clothing aren't.
A haute couture gown might cost $100k[2]. It’s not apples to apples but that’s still a difference of 10,000X.
[1] https://www.walmart.com/browse/clothing/womens-dresses/5438_... [2] https://www.smh.com.au/lifestyle/fashion/who-wears-paris-hau...