He helped bring Gus to the club, helped get Burton and JAC to the club, injected much needed funds into the club after we'd gone a long time without a front of jersey sponsor. He's done plenty in a pretty short space of time and to have someone with his financial clout on board is a huge asset, IMO.
I doubt he can force Gus to keep Elliott if Gus doesn't want to, though. Gus has control of the footy department. Judging from Gus's comments the other night, I don't think he wants Elliott gone either.