Because it isn't a free market in the USA. And those that regulate it don't seem to care. Or maybe it is those that have been granted a monopoly do everything they can to retain said monopoly. Things would be different if we actually had a free market
Free market enthusiasts' reasoning is literary the same as Communists': when it fails it's not because their believes where nonsensical, but because “it isn't real Communism/free market”.