Why spend the money on space when we have so many problems down here? The question should be self answering. 'Frontier' is the only answer to the "so many problems down here." As happened after 1492 when Europe opened the world as a new frontier, the imploding Old World itself became an exploding nova of New World Frontier. Frontier, rightly pursued (Exodus, Colonization, Commercialization, two way streets.....) is an exchange of expansive energies not just a one way street.
An Iron Curtain Bubble of physics is invincible in its load of chains of iron curtain bubbles' physics. It, Iron Curtain Bubble, is the master link. It is the sole part of the closed systemic physics that can break all open. Break it down and you break all, you open the system. We can't brink the vast mass and energy resources of space to Earth, but we can expand out to them. And in expanding out to them there is a return in energy to the Old World. The road itself is electric frontier.
The Iron Curtain Bubble of physics is invincible in its load of chains on the Old World except as the master link that we can bust via exodus and expansion and that busting will burst all the invincibility. The proof is not just in the physics, but in history; though out all history. Nothing else will work against the closed systemic world except a new birth out; except to open the universe to Earth life; to start getting out there in the biggest and soonest way possible. The word has to get out.