Monopolies only exist because of government. They would not exist in a true free market. Gov regulations keep small companies from competing and entering the market place, they love gov and regulations because it limits their competition.
There was just a great piece on the "pilot shortage", long story short, gov regs mandated like 5x more training hours for new pilots. It went from like 4000 hours to 20 some thousand. Now people who wanted to be pilots have to spend way more money and way more time to become one. Which means less new pilots. The existing pilots and their unions love it, because it just makes them all the more valuable. Time after time, gov regulations do. not. work.