Inferior Civilization?

That is to say, will the earth side economy be capable of expanding at the same rate as the space economy?

The Earth economy will certainly bump up against limits to growth sooner than the space economy. Were not as close to those limits as the people who alarmed ONeill had argued. But the Earth is inarguably finite.

Will the various societies in space even NEED the earth's economy?
They will certainly need the Earth economy for many decades to come. But in the extreme long run, into an era where most space habitats might orbit closer to the Asteroid Belt? Certainly Earth will become a diminishing fraction of the overall economy.
Regards,
Mike Combs