If a cabinet meeting decides X, but Y becomes policy instead then it's not hard to see that something has gone astray somewhere.

There's already plenty of discussion and debate about policy and politicians. It wouldn't need a Separate Public Oversight Committee with people in scary robes and fascist black leather - debate would happen naturally, just as it does already, but more so.

Why would that be a bad thing?

As for "having something to hide", the point is that pols notoriously do have things to hide - many, many things, which they would rather the public never found out about. The things they hide suck out democracy and public involvement from politics like the legislative equivalent of a black hole.

Do you think the FOIA legislation is authoritarian too? Or Finland's public financial disclosure laws? Is Wikileaks authoritarian for making diplomatic cables public?