From a more detailed discussion at Group News Blog:
Executive = Declarations: bring forth, generate something new, lead.
Manager = Requests: please do x by time y with condition of satisfaction z.
Worker = Promises: deliver competent performance in a domain, over and over.And never the twain shall meet.
Let’s walk it back to our Presidential candidates.
One speaks in declarations, inspires, leads.
The second requests you elect him to fix problems, lobbies for a change so he can fix the system.
The third talks of her competence and experience, promises she will do what she’s always done, and has the policy plans and papers to prove it.Leader. Manager. Worker.
Link via Discourse.net (Michael Froomkin)