Trooper
Full time employment: Posting here.
I think being honest is important.
It sounds like you are done, done but you don't want to let him or the team down.
I'd turn it down like this:
"I appreciate that you value my expertise, but I think it would be disingenuous of me to pretend that additional compensation (or whatever) would be a positive motivation. At best I'd be a mercenary... At worst I'd resent it. Im confident there's other people that can do it and maybe me leaving will be a catalyst for them to step up. Either way I have to be honest with you and myself."
Something like that. Assuming that's how you feel.
Great post, petershk. I do have a feeling of not wanting to let the team down; however there is enough toxicity in the air to mitigate that quite a bit.
I like your turn-down response, but might also throw in something like "I feel like I no longer have a sufficient level of passion to be successful, and thus do not want to jeopardize the outcome of this important program".
In the end I certainly do not want to burn any bridges, just in case I need them.