George Orwell rotates in his grave
Though I don't believe that a majority thinks it's OK. It's a lie.
The majority angle is likely propaganda to prey on peer pressure psychology so people come to accept it because "society" does. It also serves a secondary effect to gander a feeling of hopelessness for those who want to speak out against it.
Media: "Most people don't mind being spied on"
Apathetic person: "lol okay, I won't worry about it"
Concerned person: "What's the fucking point? It's hopeless"