> frivolously marked "top secret" in order to increase the perceived importance of bureaucrats.
This is a real problem, but I suspect the reason is more laziness than increasing power. That's no score card on number of classified documents one has access to.
Rather, it is time consuming and risky to determine classification level. No one is going to get in trouble for mistakenly over classifying something, but theoretically risks jail and fines for under classifying a document, not to mention the real harm that could arise from such an error.