Spain managed to conquer lot of territory in the New World without any particular problem, but a problem arose later as Spain didn't had enough people to settle all the areas that it had conquered. One of those areas was Florida. The Spanish lacked people to make large and strong settlements in Florida, and on top of it, they were in constant conflict with the neighboring Georgia, thus Florida became a burden. In order to calm things down, the Spanish and the United States set on a negotiating table. Through negotiations, Spain gave Florida to the United States, while the United States backed off from the troublesome boundary along the Sabine River in Spanish Texas.
Explanation: The money that the government has to spend is the money it collects in the form of taxes; if that isn't enough to cover its spending, the government has run a deficit and will have to borrow money.