Competence is not only about knowing what to do, about being intelligent and smart in the art of politics. It is not about using one's intelligence to exploit people and the political system for one's own gain, or to subvert the truth, or enrich oneself immorally without being caught. Competence has to do with knowing what is right, and being able to distinguish between right and wrong, with having the skill and determination to do what is right. In this sense, competence is moral wisdom. Integrity is about being righteous, being honest, being true to one's convictions and principles.
Integrity is about being faithful to one's oath as a public servant or as a married person.
In sum, integrity is about following, in word and in deed, the ways of God through public service. An Abiding Sense of the Common Good . One who is corrupt is not only dishonest, he sacrifices the public good for his own interests, or the interests of his family. For such a leader, his political party, his family, his friends are more important than the good of the country. But politicians in the true sense are public servants.