Playing a character is not lying it is acting. If you watch "unscripted" reality shows and think those people aren't acting (or at least being influenced by the production) I have some tough news to break to you..
I would say 99% of people act differently when they know a camera is pointed at them.
Nate started acting a certain way and was rewarded for it with money. That is called positive reinforcement. Of course he will keep up the act he is making a living off of it. And a way nicer one than a Denny's cook or night shift leader whatever he was back in the day.