I had a fantastic thermodynamics instructor in undergrad school. He was from a rough part of a city in Iran. At the beginning of the course, he told us his policy on cheating, which was zero tolerance. He added that he had seen every kind of cheating and dishonesty in his neighborhood growing up and there was no way anyone in that class would get away with anything because he had seen it all. It was a great course.

At any rate, being from a "low trust society" can also motivate someone to go in the other direction because they have seen the injustice that is a consequence of cheating and dishonesty.