Better is a poor man who walks in his integrity than a rich man who is crooked in his ways.
What can you say to this when your the poor person. Integrity is all fine and dandy but what about paying the bills. I guess integrity will help you manage what you have better so that you will never want for anything.
What about if your the rich one. One question I would ask is how did you get so rich? Was it your decided lack of integrity that got you there? If it was, its never to late! Check out the story of the tax collector for inspiration.
I am guessing that poor or rich the principle of integrity should be something you live by.