I've heard here and on other forums that the TSA should be eliminated. But what I don't understand is, with what do we replace it? Are people suggesting that giving airline security over to private firms is the right approach? In my mind, this would be an unmitigated disaster that would set us back by a decade. Reform the TSA? Absolutely! But replace it? I just don't get the argument.

What argument is there AGAINST having a federal agency that is responsible for airline security, versus putting it into the hands of private companies?