From time to time, leaders need to resist the influence of other leaders or higher-ups to do what is best for their own unit.

Instead of influencing other leaders, the leaders need to to the things for which they are assigned.

Explanation:

Yes, it is true that from time to time, leaders need to resist the influence of other leaders or higher-ups to do but instead to doing the leaders need to do the things for which they are appointed. Leaders do these things so that they can come up a more stronger and good leader in comparison of others.

In this way, the leaders don't need to  resist the influence of other leaders or higher-ups to do because their work for human or societal welfare enough to represent them as a good leader.  

money is the anwser i think