Not just democracy, economic equality is incompatible with humans as a whole. There will ALWAYS be people who control more money than other people, no matter what system is used.
For instance, if every single person made $50,000 per year, you are always going to have people who save their money, and are willing to effectively make money on that money. Even if you prevent that, and make it so every person can only spend $50,000 per year, you still have people who are effectively controlling more money (the government still has an inherent power in controlling where certain money goes).
Whenever people talk to me about income inequality, it always makes me think that if you "reset" everybody, after 50 years, you would probably have about 90% of the previously rich people rich once again, and 90% of the super poor people super poor once again. I don't really have much time for the complaints, as I know people who think they are owed everything, yet many of them were those who thought they didn't have to give a rats ass in school.
Money can't buy happiness. Just video games, which make me happy.
