While I love the idea of space exploration, sooner or later our stupid government will either:
a) Figure out we're broke, or
b) Have their credit card declined.
That day is coming. I know people have heard for years and years that the national debt is a problem and we've been able to keep going, but unsustainable trends won't. As a nation, we have incurred massive amounts of debts (public and private) with very little to show for it. The debt did not go toward investment in future growth, it was consumed. We can't afford to spend what we spend on space now.