Yes, there should be a tax that pays for military action to secure oil in the middle east.
as for military actions, i would support pulling out all of the stops so that we can eliminate the need to defend our access to global oil resources. i'm not talking about paying for the military actions with a direct gas tax; i'm talking about replacing the oil model in advance of the war over diminishing resources if we don't.
rather than kill the economy with another energy tax, i'd reallocate the money currently going to global police actions and use it instead to develop new energy technology. the oil companies can either be involved in public / private partnership, or they can get out of the way and risk withering on the vine when the next model starts being put into place.
I have noticed in my neighborhood that the most inefficient vehicles on the road appear to be driven by the poorest people. If perhaps, the cost of gas drove them to drive more fuel efficient vehicles rather than the cheaper to buy, but more expensive to run, they would be encouraging the type of reform you are suggesting. They are wasting their money to foster political ideals that do not seem to be in their best interests.
You really should listen to ecofarm; he knows what he's talking about. You won't be qualified to speak on these matters until you've had enough mercury laden Kool-Aid to comprehend all the nuances. Here's a lead cup, now don't stop drinking until you understand as much as eco.
Our real involvement in the Middle-East dates back to the cold war. While the cold war was about stopping Soviet aggression, to do so, we also had to secure and protect resources necessary to our defense. I have no problem with us being in the middle east, just that we are not using our influence to bring about change there and that we don't seem to know how to handle rebuilding countries. For those who want us completely out of the region, it's just not possible without abandoning Israel and causing massive problems to not only our economy but the world economy, upon which we depend.
Be sure to work hard and get lots of overtime. People on welfare want more steaks and free upgrades to smart phones with unlimited data packages.