In a free market, there are winners and losers. The winners have a strong economic incentive to keep their communication private, as has been the case throughout human history. If you want to prevent this, you need some sort of system that has power over all citizens. But you argue against a central authority of any sort, so how does this work?

In addition, I'm assuming given your distrust for the government and love of markets that all means of communication will be private. Private capital tends to monopoly, so we can expect in your utopia that all means of communication are owned by a small group of people. This group of people has practical control over everyone's data.

This group of people might decide to release everyone's data in order to appease your desire for a post-privacy utopia, but almost certainly they'll keep it for their economic advantage.

The resulting system you are advocating is one in which a tiny percentage of people has near-universal control over the populace.

You can try to equalize things by creating an alternative system in which all data is public, say by having cameras that stream to some publicly accessible resource. But the streaming and the cameras will be the private property of organizations that have a strong incentive for you not to do this. And since the entire infrastructure is owned by such organizations, you would be in violation of your end user agreement to start such a project. It would make you a "liar" when you signed the Internet EULA, which, as you say in another comment, is the worst crime imaginable.