Or to go into further detail now that i have time. To argue that income inequality overall is "Bad" is a naive approach.
All one needs to do is imagine a society in which the gini coefficent is 0.
Where does someone go for a loan? How much money is actually invested, versus being used for common gain? How does medical research get funded?
Wealth distribution in general is a matter of Consumption vs Investment. The more equality you have, the more consumption you have and less investment in future products. The more inequality you have, less money is used for consumption, and more is used for investment in the future, either through research, infrasturcuture or the creation of new investments and companies.
Go to far in either direction and you either end up with stagnation or excess poverty, but the truth is, you generally NEED some level of inequality in society and not just for "motivation" reasons.
In general, gini coefficent arguements tend to fall down a bit because there are a some nations run by people who rob their poor countries, and use all that money for their own consumption and don't reinvest much because unlike us, they don't really have an excess of wealth even when concentrated at the top.
