I guess the question is, if we do that, where does it stop? With the public office holders I would ask Parliament, because the public office holder doesn't just mean ministers; it's everyone in the bureaucracy. So it's quite a lot.
I'm not sure, for the percentage I would capture, that it would be worth all of the resources and the time and effort.
I mean, most lobbyists do want to comply with the Lobbying Act and the lobbyists' code of conduct.