Even the societies that claim to have a goal of equality end up with rich and poor, of influence if not capital wealth. 

TNStacker

ideasfromtheedge

The Seeds Of Social Revolution: Extreme Wealth Inequality

Many societies are based on influences of power and wealth, which generates strong inequality and creates a gap between those who have a lot, those who have little and those who have nothing. This is a social gap that the state creates. I don't know for what purpose, but it allows for a movement or a wave that generates social chaos.