Here is a brief summary:
The “upper class,” as defined by the study, were more likely to break the law while driving, take candy from children, lie in negotiation, cheat to increase their odds of winning a prize and endorse unethical behavior at work, researchers reported today in the Proceedings of the National Academy of Sciences.
From the study abstract:
Seven studies using experimental and naturalistic methods reveal that upper-class individuals behave more unethically than lower-class individuals… Mediator and moderator data demonstrated that upper-class individuals’ unethical tendencies are accounted for, in part, by their more favorable attitudes toward greed.
Tyler Cowen responds:
Let’s view these results in light of the literature as a whole (I haven’t seen any journalistic source do this). Very often in studies the highest trust, lowest corruption societies in the world are the relatively wealthy Nordic countries, not poor countries. There is plenty of evidence that it is low and falling incomes — not wealth — which helped to explain voter support for fascism. Consumers are eager to buy products from companies such as Apple, and they regard the wealth of the shareholders, and the high profit margins, as a sign they will get a high quality product, not a reason to fear a rip-off. (Can you think of many cases where consumers deliberately seek out lower-class suppliers to minimize the chance of rip-off?) The work of Garett Jones shows that high IQ predicts greater cooperativeness.