Political Power --> Corruption?

In my opinion, political power often corrupts the people who attain it.  Even though Hitler may be an extreme example, Hitler became corrupted after he gained so much power and began to go kill many Jews and other races, because he was trying to find the people he finds most ideal: the people with blonde hair and blue eyes, or at least agreed with what he was trying to do.  I think that George Orwell would respond to this question similarly; I believe that he thinks that political power tends to corrupt the people who attain it too.  In the book, The Animal Farm, on page 37, he writes, "The animals hated Moses because he told tales and did no work, but some of them believed in Sugarcandy Mountain, and the pigs had to argue very hard to persuade them that there was no such place." Moses, the crow, has much power (in a way), since the humans favor him above the other animals, and he is well fed and gets special treatment.  He is somewhat corrupt, because he tells lies to the animals and makes it difficult for the pigs to convince the animals that there is an actual purpose in rebelling, and that they're rebellion won't be completely pointless, because their descendants will be able to live in a different world without the humans, and that the rebellion may come sooner than they think, and they will need to be prepared if that is the case.  On page 38, Orwell writes, "his men were idle and dishonest, the fields were full of weeds, the buildings wanted rooting, the hedges were neglected, and the animals were underfed...he and his four men were in the stone-shed with whips in their hands, lashing out in all directions."  The people had power, and became corrupt and careless, drinking, and not doing their duties and taking care of the animals and feeding them, and when the animals get and start to rebel, they punish they with whips.