WHY you may ask? Because there is no political gain putting money in to the space industry. Politicians are more like animals than any other branch of humanity, they do what they do ONLY for political survival. They have no sense of curiosity for the unknown. NO sense of adventure! Politicians are not dreamers, they are the ultimate realists. and pictures of an asteroid hitting mars will be only so many pretty lights.
Actually, politicians have had a great love of space, but not for public safety or a sense of adventure. After WW2, the space program was a great way to put billions of dollars of taxpayer money into the aerospace industry. Then there were spinoff technologies which had direct military benefits (remember those ICBMs?) and later, commercial benefits.
That's why, in the Cold War years, the big money-maker as a scientist was physics. Grants, grants and more grants for anybody studying theories of matter, nuclear science, rocketry, the electromagnetic spectrum, etc. etc. The last gasp of this kind of funding was Reagan's SDI. Successful missile defence, and the accompanying weaponization of space, would be a major boost to NASA. But the initial costs are huge, both politically and economically. Nowadays missile defence has been reduced to talk of "rogue states" and it's been lost in the rhetoric about terrorism. People are more afraid of a suitcase nuke than something Iran might launch in 20 years.
The much safer bet these days is biology, genetics and the like. That's where all the major promise is in new military and commercial technology. Bad news if you're trying to build a hugely expensive particle accelerator. Or if you work at the JPL.
That might change if there's a Mars impact. Imagine how much more comfortable we'd be with a trillion dollar space-based weapons system if we had a credible fear of incoming rocks.
I think Aramis and Black Bat are right.