Corruption and inequality of income distribution seem strongly correlated in 2004.
Corruption is measured by CPI (Corruption Perceptions Index, from 0.0 for highest, to 1.0 for lowest corruption), and inequality of income distribution by the Gini Index (from 0 for perfectly equalitarian, to 100 for totally inequalitarian). The orange vertical line indicates the median CPI, i.e. 0.54, and the orange horizontal line indicates the median Gini, i.e. 42.3.
[Values for Austria and Luxembourg being the same and overlapping, only one data point, Luxembourg, appears in the chart].