Why does the Air Force exist?

*And also, why are there astronauts in manned space-flight?

http://www.washingtonpost.com/wp-dyn/content/article/2010/02/27/AR2010022703754_pf.html

*Also, why do we have human bloggers when there are highly capable search engines?

*And why are you reading this? Couldn't you be replaced by some kind of text-mining system?

*Also: and this is really good — why on earth do we pay bankers zillions of dollars to pretend to pilot the economy? Couldn't we junk the lot of 'em and replace them with...