I saw this recently, and it really seems to explain most of the human interactions wherein person A takes advantage of person B, with no sense of morality, responsibility, or the desirability of mutually beneficial shared outcomes.

The devious dealing is OK in Dogbert's mind because, after all, it is only a "tax on people you don't know."

This cartoon was shamelessly lifted from http://www.dilbert.com/strips/2011-08-11/ .