" 

 ::I don't believe Stan was like that because he had his memory erased a few times. First of all if the doctor wanted to, ""tweak his employees' brains rather than pay unemployment, or get sued, etc,"" then Stan would have had to submit to the procedure. There's no way that the doctor could've done the procedure to anyone without their consent and no way that he could've tricked anyone into erasing their memory. Even if Stan wanted to erase some of his memories about something else the doctor couldn't have ""gone behind his back"" and erased different memories. All the memories that were to be erased had to be ""mapped"" before the procedure.  "