School uniform for me back in the day was a white shirt, grey pants, and leather shoes. The only “school” part of the uniform was a tie and blazer with the school crest on it. And I even went through all of high school never purchasing said blazer.
This was in NZ nearly 15 years ago.
My point being, uniforms shouldn’t be breaking the bank. If schools would simplify the uniform as to not be that unique to the school, they might be able to drive down cost as more readily available clothing could be used to make up the uniform.