Well, obviously that "tiered system" isn't working or I don't understand it correctly. It is more that there is no system of control. Some politician in a SCIF gets handed a piece of paper, folds it up and puts it in a coat pocket and leaves with it. Who stops them and frisks them? And would they consent to this? I seem to recall a fuss being made by specific Congresspersons having to go through metal detectors at the Capitol. I suspect there are numerous politicians from any and all sides of the ideological spectrum who absolutely would not consent to a pat-down anytime they are around papers that have classified data on them.
I would imagine there are a few people out there who are checking their homes, cars and garages shoveling documents into their fireplaces right now rather than facing accountability. Is this a good thing? Or would it be better to know who has access to things they shouldn’t have any more? Because as it stands, we know that papers will follow people home no matter what and a certain dipshit with malign intentions can load up fifteen - twenty banker boxes of CD and refuse to give them back.