You paint an intriguing picture. Military logistics and strategies are way beyond me. My opinions are based on what I assume to be correct facts put forth by reliable sources. Perhaps my sources are just pawns of the system and overseas bases exist only because of bureaucratic inertia and malfeasance and most of us are living in the Matrix. How to tell what is reality? I'd love to see Ron Paul debate these points in depth. My gut tells me that we are not spending these enormous amounts of resources without legitimate national defense reasons for doing so.
I wish I could agree, but technology has advanced to the point where reacting to a crisis situation is a matter of hours rather than days or weeks. I would postulate that our sustained conflicts in Iraq and Afghanistan have given too many ideas to rogues. We so thoroughly dominate on an attack and invasion scenario that it would be foolhardy for anyone to test our dominance there. Where we loose ground is sustained occupation. We're not nearly as good at that. We still kick buceaup ass mind you, but our enemies are looking to exploit moral victories against us. Anything that damages US credibility on the world stage is a victory for them, even if they get the crap kicked out of them.
I'm not sure that full scale invasions and occupations are the way to go in the future. Protracted entanglements are enormously expensive, expose us to additional risks and aren't necessarily the fastest way to achieve objectives. Rapid "Shock & Awe" strikes, followed by diplomatic resolutions may be far more expeditious and economical. As much as I disagree with our involvement in the Libyan "liberation", that should be a textbook example of how to do it.
As for nations, we still hold the top hand at the table. Continuing our expeditionary tactics will only erode that position. American hegemony is a direct threat to many countries. Pulling back to a position of readiness and re-engaging diplomatically is a sound tactic. We've proven all we need to prove militarily. With a less costly military operational tempo, we could redirect resources into intel and tech. If our increased intel presence detected a growing threat, we could quite handily respond with beefed up presence and the diplomatic corps could relay the message that things need to cool off.
I don't know for a certainty that this would work, but what we're doing now is putting us in the poor house. We need to look at all areas for cost savings. I happen to think this is one area we could save money and improve foreign relations at the same time.