Lord Acton, a British historian of the late 19th century, said that power tends to corrupt; absolute

Question:

Lord Acton, a British historian of the late 19th century, said that "power tends to corrupt; absolute power corrupts absolutely," suggesting that a person's sense of morality lessens as his or her power increases.
Do you agree that power corrupts? Can you provide an example? Considering this idea, is it ethical for leaders to try to increase their power?