Come on, not everyone in America is poor. The middle class seem to get by honorably. Then there are the few individuals who have excessive amounts of wealth, and they want more money.
Sure, America is in debt and needs money. Because of interest! Shalom! Nihao! Nuclear war is unprofitable not because it destroys resources, but because it kills off buyers. They need to stage a ground war so they can sell weapons. And the gangsters are the best choice for selling weapons to both sides.
