I know these guys were US kids, but when I was at university, it did seem that foreign students from large population and highly competitive countries seemed to not have the same focus on honesty. I mean, I saw US kids cheating, but some of the foreign students would actually laugh at you for not cheating. I just took it as a difference in culture. The same way what would be considered a "bribe" in the US would just be "doing business" in some other cultures.