I've never seen a comparison of the money spent on military and NASA, but that circle graph is pretty crazy, what a waste!
If people don't realise how important space exploration is, and don't stop fighting, then we'll certainly just destroy ourselves. I think the USA, especially as it is a powerful economy, should be the ones who set the example by retreating from the useless wars it is fighting in.
I don't think it is important that the USA is powerful by having a space program, actually I really think the whole world should work together, even more in areas like space exploration, but to me, as a Brit, it doesn't really matter which country is pushing the limits, as long as I can see the result and, if possible, contribute to it.
Science is definitely one of, or the most important things we can do to survive and develop as a civilisation.