What does "what he agrees to" matter in this picture? If a deal (fanstastic as it sounds) takes place between the US and Israeli governments, they take Pollard to the prison door and if he won't move, propel him out with a swift kick in the tuchas. He going to spy again to get back in?
It means that in the, I hope, extremely unlikely event a deal like this is cut, he'll stay in jail, and pay the rent. As though his fate, Pollard's fate, means a thing to anyone involved. Pure ego.