It is my (albeit limited) understanding of the Force power 'Mind Control' that it is not something that is usually able to hold sway over a person for an extended amount of time. Correct me if I am wrong but I would have to assume that given the limitations of said power your Pirate leader would need more coercion than a simple mind trick. As for the Immobilizer you are correct, I am NOT comfortable with approving that since it can be proven (again unless I am much mistaken) that these were in short supply even during the height of the Empire. One would assume thus that the Republic would control the larger amount of these not destroyed during the war.