Citation absolutely required. Amongst other things, NASA has set huge piles of money on fire (literally!) building a rocket program that should probably be shut down entirely. Now, whether or not these particular scientific programs are a net positive investment is a more subtle point that is certainly up for debate, but "NASA has a positive ROI for the American economy" is pure assertion.

Speaking as someone who is generally pro-science -- to the point where I actually went out and got a PhD, in science -- we can't just assume that "science" is net beneficial to society. From direct experience, most science is just useless crap, and a lot of scientific funding is pure political patronage, dressed up in a white lab coat.

I do think it's a situation where the line item is fairly irrelevant in the grand scheme of things, but in a world where the government is quickly going broke, hard choices must be made, and cutting this kind of stuff will also not be the end of science.