If $2/hr vs $10/hr is indeed the thing preventing repair being economical , that seems like it can be fixed with a mixture of incentives, apprenticeship contracts, and elevating the social status of "vocational education" (the name exists IMO only to serve as status-lowering). Or if not one of those, then some other untried thing.
Edit: as sibling comments mention, if in fact the main limitation is not labor prices but exclusive-supply agreements for certain consumable parts, then this seems easily within the scope of Antitrust to address.