And remember - the greedy people and their perspectives are likely to be over-represented in your perceptions.

This is because they stand out more. Who makes the commercials? The people with millions of dollars, or the poor school teachers who just want kids to learn?

Let's say a rich person does something heinous today. A good person does something wonderful. Which are you more likely to hear about on the news? They tend to hook with morbid fascination, so the heinous act is more likely to get attention. :/

And it's not popular to talk about altruistic things one has done. It SHOULD be (Overcoming Bias just put out an article on that, which is worth reading) but there's a taboo against it. At least in America. (Christian people think that if you talk about good deeds that you "got your reward on earth" and won't receive a reward in heaven - so that may be why.)

A lot of what is good is hidden.