There's a few metaphors two examples are I thank you feom my heart and a good man's prayers are golden recompense
That I believe would be the answer, but is this multiple choice?
Answer:
Well, the pigs did later take charge and try to control other animals. That is certainly corruption. :D
They make use of their leadership position to use other animals. They use the limited knowlegde of other animals to trick them into trading with humans, etc.
In my judgements, leave it as it is. It sounds the best and most accurate.