Proposition:
We give the liberals a planet, and let them make of it what they will. It is their only planet, and last planet that they'll ever have. Any liberals who come along can go and live there rather than live in a free, capitalist galaxy.
Since liberals espouse population control through abortion, minimal impact on the environment, and other wholesome ideas, they should have no problem restricting their needs to the resources of a single planet. In their care, the planet should prosper and they should not suffer from extreme changes in climate or major natural disasters. There should be almost no pollution, and everybody should be gainfully employed due to their enlightened economic policies. Naturally, weapons of any kind will be outlawed so there should be no crime.
And if anybody should grow tired of their life on that planet, they can petition for refugee status in the greater, capitalist galaxy wide republic.
Any bets he won't be volunteering to go first?
The non-development of space resources is a political problem in the same category of impediment as the Kyoto Treaty.