Economic inequality erodes confidence in the moral order. The inability of individuals to attain the goal of wealth through legitimate means. The use of violence to attain status. A high degree of social control. Everybody else is doing it.
Rules are rules.
It's all relative. Tricks are for kids. The dominant culture hypothesis. If the number of children eating ice cream increases, then the amount of laundry detergent sold at the QFC will also increase. None of the above.