I have some agreement with you there - there is evidence somewhere that the more intelligent one is, the more ethical one is. There was a book written about it once, but I've forgotten what it is.

Yes, stupid people do lie and cheat, and while I think the lying and cheating needs to be punished, I don't think that one underpays someone who prevents a homeless person from having housing because he is 'stupid' and 'lazy.' Aka - 'Get a job.'