Trust requires Integrity
Integrity is the ability to do what one says they will do, or be the person they claim to be and is the most fundamental of three factors (Ability, Benevolence, and Integrity) in defining trust. "Do as I say, not as I do" attitudes will erode trust through the factor of low integrity. Dishonest, deceitful, and unfair treatment of a person or a situation will be judged as low integrity of a leader, which ultimately correlates to an overall leadership style of being an "assassin" or a "lap dog", neither of which are productive leadership styles. As trust is broken due to loss of integrity, it is difficult to re-establish and will likely never restore to the same level it previously was.