While this is not the problem itself, the problem with this abstract system is that it is run by those with the knowledge and who also take action and therefore seize the power over the abstract system. The problem lies in our very human nature, and how certain humans have taken to the practice of manipulating systems for individual gain.
"If so, the goal of Space Collective should be to get these ideas worked out, not only at the high level of thought, but in ways which everyone can clearly understand what we are trying to say."
Relying solely on emergence for this process is of course possible and fine to be optimistic about, but its kind of a seat-of-the-pants approach.
The collapse of our current system is almost inevitable, what is crucial at that point is how the void that is left is filled.
It seems the thinking capacities of the human brain are finally tuning to comprehend the complex socio-economic networks we've built up just in time to consider re-arranging them.
I have suggested in dimitridb's post that we start defining all of the problems / hurdles that we could come across on the path to the future that the Space Collective would like to see. As with any design problem, the first step to the solution is having a clear understanding of the problem that you wish to solve.