So postpone all further development and economic "waste" on space programs until all problems on our own little dirtball are solved? Might as well just say you never want to see further advancement into space.
People will starve, governments will be repressive, people will reproduce with abandon, rainforests will be slashed and burned, non-renewable fuel resources will be depleted, and you think by shifting money from various space programs will solve these problems? You think these problems
can be completely solved? You think you can rip corruption and ignorance from the hearts of men?
Military expenditure on this planet exceeds the money spent on space ventures by an incredible amount. There is an establishment which could survive budget cuts easily. Yet, you persist in calling space exploration and exploitation (
quite a loaded word there) a "waste?"
And again, you ignore spin-off applications. NASA research and development into advance composites, ceramics, alloys, remote medical analysis equipment, computer programs, and an entire host of other things have justified the program alone.
Brakes are better,
helicopters are lighter,
life rafts safer,
aircraft engines are better,
pacemakers more adaptable, and
burns better diagnosed. That's an extremely short list of various spin-off technologies.
As long as we sit on this planet, we are only counting the days until our extinction. One way or another, that will happen. However, if humanity is able to colonize other worlds, and especially create self-sufficient colonies; we may see that chance towards perfection, or at least maintain that hope. Which will be rather hard to accomplish when the species no longer exists.
Of course, if people are too complacent to take that first step that will open up the universe, they deserve what awaits them. We are able to take that first step, failure to do so is insane. Of course, the majority of people throughout history would rather stare at their toes than gaze at the stars.