No political party cares about anything other than getting in office or staying there. If the Democrats put a stop to this then the Republicans will call them

No political party cares about anything other than getting in office or staying there. If the Democrats put a stop to this then the Republicans will call them weak on security and unwilling to keep our country safe. There will be millions spent on attack ads saying this. The Democrats will lose the next election. The only way that would change is if the majority care enough to do something about it, and few do. Most people do not know why anyone would not want to use the machines, so they go through them. And of the ones who do care, many of them paid lots of money for their flight, want to get to it on time, and are likely trying to go somewhere important. Thus, it persists.