Things don't have to be expensive to be original.
Look at the music industry. A CD from an indie label by an adventurous, creative artist will cost you the same amount as a CD by the latest corporate focus-grouped mass-market teen pop-sl*t sensation. If something is truly distinctive, it becomes inherently self-selecting.
I propose that the vast majority of the people who have been marketed into thinking Ashlee Simpson is their favorite musical artist ever would actually prefer deep down in their souls to find music that was more attuned to their individuality. I'd argue the same of all the people who are obsessively into Dior or Prada or any of the big houses whose appeal far outreaches their distribution.
If fashion becomes more decentralized and more humanist, it will mean more designers working and more originality in the marketplace. As with music, people will start to make more of their own choices as the choices available become more relevant to them. Presently, for most people the choice between "meaningless widget A" and "meaningless widget B" is meaningless until marketing tips the scale.
Yes, fashion will always have a justifiably high-priced high end, in which craft and materials necessitate the price. (e.g. Bespoke tailoring that provides a fair wage to the tailor will never be cheap.) But expense does not automatically equate to originality, not in this modern era of brand tyranny. A $250 Dior t-shirt is expensive primarily because of branding, not because of originality or the degree of craft required to produce it.
I don't fear a world of cheaper fashion because I don't think it will lead to the whole world walking around in Dior. Maybe I'm being idealistic, but I look forward to a future when people feel fashionable not because they are wearing Prada Sport with the little red bit hanging out for all the world to see, but because they are wearing something that suits them perfectly and they look so
good it won't matter if no one recognizes the designer.