No, it's not that its imperfect, its that it is non existent.
We have the rule of men who can do pretty much whatever they want, without repercussions.
Imperfection would be if %10 of the TSA employees prosecuted got off without punishment.
Criminality is the situation where none of them will ever be prosecuted.
But just like Germans in the 40s who couldn't believe the holocaust happened because they couldn't comprehend the possibility that their government could be that evil... american kids, indoctrinated in state worship in state schools can't conceive of the possibility that their government is nothing more than a gang of violent criminal thugs.
We do have a rule of law, it just ain't perfect. Otherwise, we would be like China.