I like the Lieberman joke, but the original metaphor isn't quite right; there's definitely a difference between (on the one hand) the relationship between the ACM as an organization and its members, and (on the other hand) the US Senate and the citizens it represents.
It's very possible for an organization to have interests that are not identical with the interests of its constituent members.
It's very possible for an organization to have interests that are not identical with the interests of its constituent members.