Relevant CGP Grey.

From the point of view of "can you hold power and not let your heart of hearts be corrupted?" - Yeah, sure, why not? The problem is that as soon as you have a significant amount of power, someone else is going to want it. Probably someone with fewer scrupals. So you will quickly be forced into utilitarian thinking - you must do whatever is necessary to maintain your position of power, lest you be usurped by someone worse. And what is necessary to maintain power, to a common person, is often corruption, violence, and austerity for the people.