In food, about 25 billion. That's big enough for Congress to notice.
In salary for all the trainers, you'd need another 5 trillion dollars. Figure 10-15 trillion for all the guards necessary to keep the unwilling Americans in and in-line. Add in profit for the private companies doing the work, and you're looking at a firm 25 trillion dollars.
There you go, big Liberal government at work, wanting to spend big money, with Congress powerless to stop them (except for that whole power of the purse thing).