Tradition and Holy Scripture taken together are known as 'The Deposit of Faith'. It the job of someone to preserve 'The Deposit of Faith'. There is a need to preserve the truth. In every level of our society we have leaders and followers, some form of government. C. History shows that no civilization, country, city, or organization, has lasted for very long if there were no effective government for the people to follow, trust, and believe in.
Some office is needed to interpret, enforce, and follow the laws.
The Romans had Caesar and the Senate. The United States has a President, Congress, and the Supreme Court. A state has a Governor and a Legislature. A corporation has a CEO and Board of Directors. The Catholic Church has the Pope, Bishops, and the Magisterium.