How to Manage Corruption (Knights of Honor 2: Sovereign)

How to deal with corruption, which now takes 50 of my income of 500 gold. Very annoying, how to get rid of?

Solution:
What are the opinions of your people? If you are clear it is most likely the Tradition of Bribery, the ability to bribe the Prince is really strong, including the ability to simply buy his domain through your spy if he becomes ruler, so this is counteracted by the addition of a permanent 10 Corruption that translates to 10% of your income is lost, and you just have to live with it (or get rid of this Tradition).