“Add days to the days of the king; may his years be from generation to generation.” (61:7)
The argument for term limits is that after a certain period of time, elected officials become difficult to remove because the thoughtless inertia of voters keeps them in office. Such officials no longer feel beholden to their constituents and the only way to remove them is to limit the number of terms of office they are allowed to hold.
The counter-argument is that learning how to be an effective leader takes time and experience, and thus we are best represented by long-term elected officials. Better the experienced leader we know than the unseasoned novice we don’t.