leadership by example. all gov't officials should be role models for everyone. that's the ideal thing but we know it's next to impossible in this country. corruption is so deeply embedded down to the lowly of the low employees in public service.
another way to eradicate corruption is a very stiff punishment like imprisonment or even the death penalty if the guilty party is a gov't employee.
maybe also follow china's lead by having the parents (of the guilty person to be executed) pay for the bullet to be used in the execution.
maintain a consistent standard in dealing with violators of our laws - be it rich or poor or celebrities like movie actors or actresses.