I wonder if this dishonesty and greediness in the workplace might stem from a characteristic of fundamentalist/extremest groups, called "nihililsm". Karen Armstrong uses this word in her book, "The Battle for God" to describe how fundamentalist believers would ignore the very basic principles of their beliefs (a Jewish suicide bomber eating bacon and eggs the morning of his mission, Muslim fanatics partying drunk before hijacking a plane).
This might come out of their conviction that the world is hopelessly corrupt, and therefore it is fine to throw convictions to the wind. The world doesn't matter.