Sorry, weird double post. I thought my first one had been deleted.
Damn mobile phone.
On the payment thing: usually you get payed after, at least in my country the salary you receive for april is deposited end of april.
Let's say you unpledge from a power, than you should be paid for the work you've done. I'm with you there. But defecting is an action which is against the law of the faction thus, every relationship or agreement from before is void then. You have that time that you can't pledge to a new faction after leaving the last one, that's the contract rule. By defecting you break the rules, therefore no payment seems appropriate.
But perhaps i'm even mistaken by how the game mechanics work. It's not my native language, i've a tad bit trouble expressing myself here...