You may be oversimplifying your principles. Southwest contracts out heavy mx to the islands were fewer workers have A&Ps or speak English, they're just "supervised" by an A&P and work for less.
We have all heard about NAI, but plenty of trades are contractors now instead of company men. Every power plant, oil refinery, or chemical plant has far more contractors than company folks working in them.
The story is always the same, either know someone, or work as a contractor until you get chosen to be a company man.