Others have listed some great examples, but to be honest I was actually thinking of something somewhat more contemporary, specifically the eldar (or dark eldar perhaps) in Warhammer 40,000.

The long story short is that the Eldar once had paradise, and spent their time seeking greater and greater excess and pleasure, which eventually gave birth to an immensely powerful demon of excess. For the current-setting followers of this demon, their lives are spent in a desperate hunger for excess that can never be satiated, every greater excess they experience quickly becoming too dull to bare. As for the Eldar, their paradise is gone and their race is doomed, all they can do now is fight off the inevitable.

Obviously I don't think the rich have much to fear in terms of giving birth to a demon, but you get the point