Frankly speaking, if we're going to be tracked (and we are, lots and lots), I want the government as involved as possible, whether through strict regulations or through being the central repository for that information.
Maybe do it state-by-state, so long as each state follows some federal guidelines and each state provides a way to interoperate with the rest, and with private businesses that need access to that information, if the feds freak you out.
Why?
Because I can, in theory, have my say in how the government operates. I can vote, I can submit comments, I can go talk to elected officials, whatever. I have zero recourse when private companies schlep my data around and wreck my life. Voting with your vote is best, but I can't even vote with my dollar with Equifax.