He hadn't 'bargained on' how his new position in the company would change the way people treated him. [=he was surprised by how his new position changed the way people treated him]
You're allowed to go to the football game tonight, but I expect you to 'keep your side of the bargain' [=do what you agreed to do] and clean your room.
They've agreed to turn the land over to the state, and the state, as its part of the 'bargain', has agreed to keep it undeveloped.
(..) .. I want something young and creamy. .. A gamer that takes to the crop and the spur. .. You drive a hard bargain. AII right, cents. .. I'm very fIattered, but I'm just not interested. .. You gotta be interested. You're a whore! .. (..)1999 Wild Wild West