"One political problem is do we actually want large economic growth which doesn't neccesarily revolve around cheap human labor or resources?"

I mean getting cheaper labor and resources from countries which have "depressed" economies- Latin America, MiddleEast, SouthEast Asia, and other Third Worlds.

I'm not saying involving ourselves in third worlds is "bad" but being so dependent as we are currently are for this type of economic growth has inavoidably [bad] consequences. Another of saying this is that in the long term, space development is a very cheap alternative and extremely profitable [money, growth, happiness, peace, etc..].