Yes, I was just providing a suggestion - how's this - basically, the more powerful a player is, the less benefits he should get from being in a guild. That does not mean he cannot be in a guild, and get the benefit of having allies, but that he has to invest a lot [resources, guards] into the guild [or guild city] but he will only get a minimal amount of stuff in return since he is so powerful to beging with.
"Yes... I am writing a book. So far I have the page numbers." - unknown author.