"[I]t is essential to the freedom and to the necessary independence of the deliberations of the body, that the members of it should be exempt from punishment for acts done in a collective capacity; and the security to the society must depend on the care which is taken to confide the trust to proper hands, to make it their interest to execute it with fidelity, and to make it as difficult as possible for them to combine in any interest opposite to that of the public good."
- Federalist Paper No. 66