Gini index measures the extent to which the distribution of income (or, in some cases, consumption expenditure) among individuals or households within an economy deviates from a perfectly equal distribution.
High Gini Coefficients generally indicate third world country status.
Measurements show that the USA's Gini Coefficient has been rising rapidly for the last 44 years. I will let you draw the conclusions of what status the U.S. will be in the next 50 years if this trend continues.