Response to a bought a little city

I want to talk about the word "Imagination" or "imaginative" which appears in this short story eight times.It is a little difficult to understand these words in this short story. The first four words i can understand that it means fantasy, at that time the manager care about his people and are selfless. But after some people complained his attitudes started to change since the fifth times the word appeared. He became selfish--he asked cop to buy KFC for him and killed dogs to satisfied himself(This is also a part of the reason why he kills dogs.) Then the word "Imagination" or "imaginative" means selfish. But i still do not understand the last two times it appears.Why he said god got a better imagination than he did. And that is a sample of his imagination, which one does this his refer to ?