Accountability introduces a number of thoughts.
There is the implication of what is required. We are required to be trustworthy, faithful, examples, and people of integrity.
There are certain expectations. If we expect little/more, we get little/more. When leaders make decisions, we expect to be held accountable.
There is an understanding of responsibility. If we are accountable, then certain responsibilities are connected to our decisions and actions.
We will all give an account for our deeds in this life, good and bad. How much more so for leaders who answer to God for leading His people?