Purchasing power to wealth distribution

Graph is showing the linear relationship between wealth distribution (20% richest to 20% poorest) and the purchasing power of the citizen within one country. It is meant to show the importance of certain social distribution within economy for it's success. It is easy to observe, that this is not a general truth, as economies   like USA or Hong Kong, with lower wealth distribution.

The graph above shows the linear relationship between the same purchasing power and income distribution once your income (PP) reaches 20.000 USD and income distribution is less than 20x in-equal between top 20% and bottom 20%.