Unions are organized haters of their benefactors, employers. When they do not get their way--more pay for less work--they seek to harm the firm (and non-union workers), often through violence. This time, airline unions used the violence of government to harm their employers. So now airlines like American and Southwest have to jump through impossible bureaucratic-paperwork hoops, leading to vast groundings and harm to passengers. This is exactly what the unions want, since they have all the forsignt and ethics of the scorpion in Aesop's story. And now Frontier Airlines has filed for bankruptcy.