Transparency needs an information threshold. The easier it is to unearth information the more value will be placed on technology that protects information. This privacy tech would be adopted by everyone.
The conclusion is that the for every action there is a reaction. Push people into transparency and watch demand for real privacy increase.
We need privacy by technology not by laws.
People need to realize, privacy is a matter of life and death for some people. For the people who need privacy to live, arguments for transparency don't make sense. The issue with privacy isn't a matter of everyone having the option to go transparent, or some force making everyone transparent at the same time, but it's likely to be that the first to go transparent are the first to be torn apart by the angry self righteous ignorant mob.
The moment everyone is transparent the quote miners will have a high paying job of finding stuff people said which can be easily pulled out of context. The richest people in society will hire these quote miners to destroy anyone who gets in their way by using transparency. The angry self righteous ignorant mob will see quotes taken out of context, and then destroy people based out weird quotes from 5 or 10 years ago. It may even get so bad that people will someday be persecuted because they had obscene thoughts, because in a fully transparent society even your thoughts must be policed.
As far as government agencies go, undercover cops, informants, even they need privacy. Bytemaster made a good point that in a world without privacy you can't have government agents but he was wrong about something else. In a world where humans can't be government agents, the government agents will be machines, robots, software informants.
The French Revolution: Crash Course World History #29
https://www.youtube.com/watch?v=lTTvKwCylFYTerror Robespierre and the French Revolution Part 1
https://www.youtube.com/watch?v=knDe_EZSxTwTerror Robespierre and the French Revolution Part 2
https://www.youtube.com/watch?v=jPWw1sKYNXYhttps://en.wikipedia.org/wiki/Reign_of_Terrorhttps://en.wikipedia.org/wiki/Law_of_Suspectshttps://en.wikipedia.org/wiki/State_terrorism