Many of the plans that the space exploration teams have arent practical now, but in 15 or 25 years the products will be available to do it cheaply.
Right now the best program(the shuttle) is still having big setbacks(like the shuttle reentry disaster). Discounting the cost to human lives(and I wouldnt for anything else but a simple discussion) it cost MANY Billions for EACH mission.
Lest you forget, MOST of the world is poor. The USA WASTES most of its resources whether through incompetence, mismanagement, or apathy, it happens(Telexens' observations). Right now it is considered more important to be humane to people.
To feed each child dying from hunger, And his family,community, or nation etc. is more important that going to the moon.
NOT to mention healing the sick, exploring the "inner space"(the oceans, the earths mantle, our weather so we can prevent people dying from hurricanes, tornados etc) all of those have a greater chance of improving more peoples chance of survival NOW than the space program will.
Have no doubt, space is somewhere we will need to go.
But, until The chance of a big catastrophe happening killing off our species is proven, we wont.
As suggested here:
http://www.cbsnews.com/stories/2002/...in516570.shtml
And
http://slate.msn.com/id/2078157/
Different space exploration forum discussion:
http://www.matthewyglesias.com/archives/000261.html
But not until everyone here on this earth is taken care of to the best of our abilities. Or until a THREAT IS PROVEN emminent that we need to leave our Earth.