"Thought" Police

The thought police are everywhere. Most people are afraid of the thought police, so they hide. They are so afraid they do everything perfectly. They don't speak to one another, afraid to think for themselves, and they cant even do what they want in their own homes. But why do they think the police can really read their thoughts? I believe that the police use the term thought just to scare the people into thinking the people are listened to through thoughts. Shouldn't the people realize that they truly cant?