The role of the apostles (not just the twelve) was the happy duty of witnessing to the Resurrection of Jesus Christ.  The administrative BS is a human invention that can change, including how we select them and whether we give them a checkbook (I say no).  At the Last Supper, Jesus demonstrated in the washing of the feet how he wanted Church leaders to behave.  Their actual behavior has turned Holy Thursday's reenactments into a cynical farce.