We have often seen how leaders who got into power because of backing from their tribe, sect or regional and ethnicities are the most corrupt ones because they knows that their people will vote for them regardless they do any good work or not. Look at African nations and even some Arab nations the reason why they are going through corruption and suffering is because people don't vote based on merit rather on personal relationship like sect, ethnicity or religion and then there comes countries like India and Pakistan where they win based on vote from majority community by instilling fear that minorities gonna rule them if not votes to power and next five years everyone suffers.
I would hold people accountable for being in an creating a corrupt leaders rather than the leaders themself.
It actually true especially in Africa here where their are so many tribes and different enthnic, and to me, it's very wrong and that especially has emboldened the corrupt politicians to do things with reckless impunity believing that his or her tribe are behind them if the people revolt against them.
Lastly, in our society today, mostly in Africa and most part of Asia, evil people are progressing to a higher stage of evil and they are doing more evil with reckless impunity because people that should have stopped them mostly stay silent in the face of evil because they feels like it not affecting them at present, which is very wrong, until they curb that menace, corruption will continue to strive in the society.