As per Wikipedia:
"BuSab acts as a monitor of, and a conscience for, the collective sentiency, watching for signs of anti-sentient behaviour by corporate or government entities and preserving the dignity of individuals. Some essential functions of government are immune from BuSab by statute."
"BuSab monitors even itself and employs sabotage to prevent the agency from slipping into hidebound stasis. Agents are promoted to the head of the organization by successfully sabotaging the Secretary. By the same token, there is no term limit imposed on the Secretary of the Bureau of Sabotage. As long as he is alert enough to avoid being sabotaged, he remains qualified to lead BuSab."
'Their motto is, "In Lieu of Red Tape."'
When the current system of checks and balances just isn't enough...