Come on now. I've been poor and even poorer and know from considerable personal experience that being poor exaggerates most people's willingness to lie cheat and steal, and it has virtually nothing to do with race, except that in some cases there may be a different cultural training factor at work.
When a person is blessed with enough socioeconomic advance that they are not afraid for survival any more, they let up in many cases, and start giving a more even break to their fellow citizens. This does not seem to me to be a white or non white thing.