Craig Daniels reportedly negotiated a larger than normal share of the profits from the last 3 he did; there's was a script writers strike on during Quantum of Solace and he chipped in to fill the gap. So he's done exceptionally well out of the franchise, especially with the last 2 earning multi-billion $$$.
To retain his services as Bond the studio is effectively bidding against the money he's already (deservedly, in my humble opinion) earned, and as that's a lot any new deal is also going to have to be large to overwhelm any oh-no-not-again feelings.
Biting the hand that feeds IT
