User blog comment:Blackendedsoul/Law's Bounty and the World Government's Treasury!/@comment-3119203-20120312124045/@comment-3425840-20120312153811

Well think of what a government normally does, running the whole country (world in this case) that includes building highways, railways, research on other fields than weapons and all such stuff which the World Government of OP does not do properly, so they can have high war budgets no problem. Also I am pretty certain that they impose harsh taxes on the general populace to squeeze as much money as possible.