The existence of law itself is the only necessary support... Law is merely encoded social obligations that the government will enforce. That a single law constrains corporations in any way (and that is clearly the case) proves the statement.

In the broader context GP is clearly advocating for what the law should be, or should be changed to should certain events come to pass. Demanding support in existing law for a proposed change in law is nonsense if that's what you meant to do instead of narrowly discussing the nearly vaccuously true quote you pulled out.