> I think this has to do with the lack of notable "stuff" nasa has been doing over the past few dozen years because of budget constraints.
No, it has to do with 90% of NASA's current work having no benefit to the day-to-day life of 90% of Americans.
> It certainly wont fix the problem, but finding a reason to dump a few hundred billion dollars into an agency that brings up to 14x economic returns in addition to a boost in national pride is a pretty good investment
Your citation:
> Some early academic and other studies “made very ‘generous’ assumptions about the spinoffs, goods and services produced as a result of NASA’s investments,” G. Scott Hubbard, a consulting professor at Stanford University, said in an e-mail. A study commissioned by Hubbard in the mid-2000s when he was director of NASA’s Ames Research Center in California on the center’s local economic impact found a “more conservative” 2- to 3-to-1 ratio.
So 14x isn't realistic, more like 2-3x. And there's no comparison with other public investments. Obama said the Human Genome Project returned 140x. One study said highway investment returned 52x in the 1950-1991 period [1]. Public preschooling allegedly returns 7x [2]. What about reducing crime, subsidizing college tuition, medical research? All of these things, by the way, are exactly what people mean when they say NASA is a waste and that problems "at home" should be addressed instead. I think these concerns are legitimate and should not be waved off as "not caring about science" (doing so definitely alienates those whose support you're trying get though). We all live on Earth.
Announcing a Mars mission won't bring national pride. Completing it will. The only way that will happen, and I'm certain it will, is a space race against China, once they solidify their currently vague space ambitions [3]. I hate to say it, but it was jingoism which spurred Apollo, and it will be the same with a mission to Mars.
[1] 32% per annum simple interest over 40 years, http://www.fhwa.dot.gov/policy/nadiri2.htm
[2] http://www.ed.gov/blog/2013/04/obama-administration-budget-m...
[3] https://en.wikipedia.org/wiki/Chinese_space_program#Mission_...