A human being feels able and competent only so long as he is permitted to contribute as much or more than he has contributed to him.
A man can over-contribute and feel secure in an environment. He feels insecure the moment he under-contributes, which is to say, gives less than he receives. If you dont believe this, recall a time when everyone else brought something to the party but you didnt. How did you feel?
A human being will revolt against and distrust any source which contributes to him more than he contributes to it.