Democracy in itself is a idealistic economic idea. Unfortunately, It is not impossible for a few bad people to use democracy for their own gain. A democracy in itself relies on a "head of state" of sorts to ensure everything is working accordingly. This already starts the roots of an aristocracy because in a gov't position (or considered "high society"), You already have an advantage over other individuals. I would point to some Middle Eastern countries as example. One can argue that Greece is not a terribly poor country, But there is definitely poverty and definitely an aristocracy. The same is true in Mexico. There are people who use means (mostly illegal) to extort and steal from others in "democracy". In any gov't style there will be an aristocracy unless everyone wants to return to the tribal bands of the paleolithic era.