Eons ago when i was at secondary a lot of the blazers were recycled. A group of mothers replaced any binding that looked dirty. If necessary the school had a supply of replacement embroidered pockets. It wasn't obvious who had hand me down vs new.
About 10 years ago we spent a week in a home stay in Khayelitsha township at Cape Town. Supposedly one of the five biggest slums in the world yet each morning when we headed out there were large groups of children in clean uniforms waiting for school buses.