That’s because 3/4 of the people know they will do the wrong thing if no one is looking.
Your comment reminded me of an old hymn we used to sing at church when I was a girl.
A popular revival song, “There’s An All Seeing Eye Watching You”, by J.M. Hensen dating from the early 20th century...some of the hymn’s lyrics:
All along the road to the souls true abode,
Theres an Eye watching you;
Every step that you take this great eye is awake,
Theres an Eye watching you.
Watching you. Watching you,
Evry day mind the course you pursue;
Watching you, Watching you,
Theres an all-seeing Eye watching you.