In my opinion a lot of people are getting paid way too much. Min wage workers often have to work harder than those in the higher positions yet they are getting paid less. It is unfair, and does not encourage people to do a good job. Fashion designers do great work, but that does not mean they need more money.
Top fashion designers get paid accordingly, and other who do not are clearly not as in demand. The fashion industry is hard to break into, largely due to the vast pool of somewhat talented applicants that can be trained. While high fashion requires a special eye for creativity, fashion to be bought en masse by the general population has far more to do with the needs of buyers than the designers.