I knew I should have qualified that more. You're right, McDonald's is not blue collar, but working in a manufacturing plant riveting part A to part B is. It a

I knew I should have qualified that more. You're right, McDonald's is not blue collar, but working in a manufacturing plant riveting part A to part B is. It also encompasses stuff like mechanics and welders that do require skill and even some education and certification. But regardless, most of the time it's still used to mean something lesser.