If anything it's member's only laissez-faire, where only those with enough money to buy lobbying influence are given carte blanche.
That thought experiment doesn't help though, since at the level of abstractions we are talking on, just having courts to enforce normal contract law can be construed as "intervention" of a kind. Wolves of various kinds typically decry shepherds for not allowing them the liberty to eat of the flock. The whole point of this civilization thing is to pull us a bit above/out of the state of nature. So "no government intervention" isn't a viable setting for a civilization.
I suppose I could have stated it better by saying that the regulation that's in place is merely a puppet for the lobbyist, providing the facade of regulation, when it's 'laissez-faire' since those paying the lobbyists are allowed to do what they wish.