I love Dave's approach towards discussing the notion of pigs, chickens, and accountability. I couldn't agree more with the overwhelming majority of what he has to say in his post. Of course, I have something to add. The pigs and the chickens are equally invested, and if they're not, they should be given up like lambs when the farmer arrives to collect what's his. There's a lot of metaphors (metaphii?) for this so I'll use what comes to mind.

"If you aren't a part of the problem you're a part of the solution." Or reversed, as you're more than likely used to hearing.  

"Get on the bus."

"Can't we all just get along?"

And so on. Bottom line is, if your whole team isn't invested in the success of the mass the members who stand in the way of the mass must be educated to the negative impact of their existence. Maybe then they'll get back on the bus and lend a hand to the task of getting things done.