Thinking about it, besides library access, the internet is already behind ISPs and requires funds to access. Having I2SP's does not solve the underline problem.

The TOR network is probably the closest thing to what OP is describing but that is filled with illicit material and has no safeguards. We all pretend we don't like internet laws but those rules keep criminals below the surface and normal users from accidently stumbling on it.

Anonymous KYC is the way forward. Legislation on preventing bots presenting as legitimate users should be implemented. Similarly to how the world has mostly made robo calling illegal.