It really is in the “national interest” for the US to maintain, through costly wars and killing of innocents, the USD hegemony in oil sales as established by the petrodollar thanks to Nixon/Kissinger when the last vestiges of the gold standard were dismantled.
What happens when the rest of the Middle East finally gets sick of the petrodollar? What happens when Saudi Arabia collapses in its US supported dictatorship? What is the true value of the USD when printing trillions ofdollars is standard policy (AKA Quantitative Easing) and national debt doubles during the reign of a single President (both Bush and Obama)?
Yes, the military-industrial complex has blame in this, but the greater blame is the insatiable ignorance of the US electorate and the “greed” of its “entitlement” class to push politicians to greater depths of debt. Politicians ultimately are followers, and the “true leaders” are the ignorant masses. To feed and placate the masses on government handouts requires the US to be in perpetual war.
If you allow the rest of the world to freely choose which currency is strongest, without the use of coercion or threat of violence via the US military, the politicians/beuracrats know better than the electorate that the USD will collapse.
The Welfare Economy = Military State = State-Sponsored Terrorism