NASA Needs A Mission
But, more than money, NASA needs a clear vision of what it should be and what it should do. Without a driving sense of mission, space travel isn't going to yield much science or technology.
That's not to say we should ground our astronauts. Dreams and scientific discovery are hard to come by, and $15 billion is only a sliver of the $2.2 trillion national budget. But spending it on a glorified ferry service is a waste of money. If we're going to dream, we should do so on a grander scale. If we're going to send people into space, we should go boldly or not go at all.