For an example of the evil, greedy rich person, see pretty much every movie ever made. TV Tropes has a pretty good section on it. So does the Bible. For that matter, so does life. If you need more evidence and have a few lifetimes, feel free to read through the 50 million stories this single Google search returned on "charity worker arrested for embezzlement." If you're immortal and the sun hasn't exploded by the time you finish, we'll wait.
Money corrupts, and there is no denying it. It's why we hear so many stories in the news about politicians ripping off ridiculous amounts of money from the people they serve, yet doing less jail time than a poverty-entrenched person who was caught with a joint. The rich get away with it because they have the money to buy their way out of punishment (through better lawyers, private detectives, bribing the judge with fine meats), which then reinforces their will to commit more atrocities, because ... well, why not? There's no downside. Not really -- not when compared to fucking jail. But hey, it's not their fault. Evil money just claimed another victim by turning an otherwise honest person into an agent of greed. They're victims, people.