It is difficult to criticise your thesis , most of your points are desirable .
You failed to protect the Political impact of Whistle Blowers .
The Political Process relies on Public Servants confidentiality to allow solutions to be developed to resolve laws , solutions , positions to be developed to best serve the People . Anarchy is not an able provider .
Politics in Government or Enterprise is a competitive pursuit in the development of a Patent .
In every pursuit there is grades of Ethics , timing is relevant . A glaring example is Education in Australia , here a gravely corrosive Education Philosophy has been allowed to persist for nearly ten years . Education Bureaucracies have locked down Teachers from publically speaking out . Education Unions have assisted in this malaise taking advantage of SOSE to introduce Political Ideology . Teachers in Western Australia have broken their shackles and are speaking out on the Net , Google PLATOWA to find out , in the rest of the States Teachers are dynamically Screwed .

Liked what you had to say here - could you go a little further however and suggest some way to offer protection to those who make reasoned and thoughtful but apparently politically incorrect comments.
The media appears to be wary of publishing many such comments. As things stand 'political correctness' is denying the right of many people to be heard. Surely we need to differentiate between the laws of libel where 'hatred, ridicule and contempt' are the issues and reasonable comment? Yes, it is often a fine line but too many people now fear that action will be taken against them by a minority group and nothing is said. This leads to a lack of debate, secrecy and a failure to educate people on issues of importance.
Would really be interested to hear some views on this one.

it's all about power. parliament has inherited the power of the norman warlords, and this power to tax and imprison is sufficient to maintain themselves in power, as long as no one knows how corrupt and ineffective they are. hence, the need for government secrecy.

they will not give up power, no one ever has. if you don't like what they do with their power, you have to change the system.

fortunately for the wizened souls who have fortified themselves in parliament, generations of submission have bred a populace who regard politicians much as they do footy stars: not necessarily nice, but superhuman. there is no concept of democracy here, the limit of people's aspiration is to be ruled by a 'nice' politician.

the writer says "protect sources" but forgot to add 'please', all ozzies must add 'please' for they are subjects, not citizens. they will only ever get what their masters want to give them, and i bet freedom of speech and press won't be uppermost in the prime minister's lollybag.