The US govt has a responsibility to keep the PetroDollar in tact since Nixon killed the gold standard, otherwise the global dependency on USD is no longer maintained and other currencies have a chance to replace it.
This 100%.
US Govt is propped up on debt. We have no financial discipline today and none is anywhere in sight. If our currency loses value we're mega-fucked.
If petrodollar goes away, our currency loses a lot of credibility. And we are doing everything possible to ensure that everyone involved wants nothing to do with us.
Great strategy :)