Because those of us with realms at war (continent-wide war, no less) don't want to see tens of thousands more gold taken out of their realm that could be used to fight with instead?
Not every island is Atamara. Not every realm is Darka. It's very nice that your realms produce so much gold you don't know what to do with it, but some of us actually need the gold our realms produce so we can fight.
