One person?? That is where you have it totally wrong. Its a team responsibility to pull the team together when things are starting to go awry. Do you think Lenny Hayes stands back and waits for Roo to do something or Mitchell or Hanneberry or pendles or bartel???? You dont need to be captain to show leadership or do things that can pull your team together when things are starting go one way.
The only difference between Jones and the the two Jacks should be the jacks do a bit more off field media, promotions, sponsorship commitments etc