I would also like to point out that if you look at who has what responsibilities within Imperium, you will see a higher population of Wessex members then of others. That is because to be a member of Wessex, you typically have a higher sense of responsibility and calling.

So if we were to just leave, we would leave gaping holes in the Imperium, which is not something we could (or should) do to someone who has been such a loyal ally.