If he wants more money than a deal that will make him one of the highest paid players in the game, then he can tell his story walking in my opinion.He wants another offer, much bigger than the big offers he currently has received.
He's currently benefiting from market conditions in terms of the money on the table for him (few good halves available, salary cap increase).
Yes, he is an excellent halfback, but even with an increased salary cap, I can't see anymore value than $1.2 million, when the reality is he would likely be in a decline in the final year of a 4 year deal.