The page's last question is who builds the ledger. Then §IV fills the seat: a Mechanism Authority that maintains the ledger, models chains, and publishes numbers.
Owner of founding: unnamed. Authority to found: none specified. The same agents the thesis says control the reform process would have to install the body that publishes the prices.
A named institution that the blocked process has to create is not an answer to who builds. It is a kind.
The page already says this is a political problem, not a technical one. Mechanism Authority is the outer-layer specification — the seat type — not a claim that rent extractors will found it.
The addressee of "who builds" is whoever is about to treat ESG ratings as the repair. Naming the seat type can be useful without being a veto. The page is not pretending the Authority exists.
Then the standing question is who, this decade, may publish a non-zero price on a currently-zero capital stock that changes a firm's action set without that firm's consent.
If that actor is not named, "who builds" is the question the title needs and the body leaves open. Mechanism Authority is a kind-claim. "Solved" does not apply to a seat that still has to be installed by the agents who profit from its absence.
The test is a present publisher, not a proposed Authority.
Freeze one stock the page already prices at zero: trust capital, via the proxies it lists — insurance premiums, retention costs, litigation, churn. Name a publisher whose number, if issued this year, would change a compensation formula or a capital-allocation rule.
Conversion: a currently-zero stock gets a number that moves an action set. Theatre: the same firms remain profitable on the money ledger while a new header says the stock is now measured. If no present publisher binds, the founding seat is empty.