MERC:

One thing that has hampered the CIA's mission is the oversight conducted by Congress. Congress does not need to know everything the CIA does because Congress, for one thing, is a massive sieve. They can't keep secrets. Let the CIA do its mission. Intelligence gathering should be given a lot of latitude. Let the CIA do their job, and that is making the US a safe place to live.

Simplicity, it must be bliss. Two points to consider. One is that the Constitution says a little something about Congressional oversight. [But who cares about that anymore?] By your logic, maybe we should let the CIA destroy all evidence of that too, eh? The second is that this dreamy-eyed view of the CIA is painfully ignorant of the actual history of the institution. The CIA may protect the US, but it has hardly made it a safe place. [Hello 9/11!] Furthermore, if the CIA has made the US safe, a dubious claim to be sure, it certainly has made the rest of the world a dangerous place. See, for a few quick examples, CIA involvement in Guatemala, Chile, Argentina, Cuba, Iran, and the Congo.