While I don't think the post you're referring to offered any deep insights, it's definitely not a conspiracy theory to state that the ability of the US to sustain their deficit spending largely depends on the dollar remaining the default currency of the global oil trade, and that maintaining this status quo is one of the key missions of US foreign policy. As such, it's one of the factors that determine US military presence, or interventions.
Specific conspiracy theories aside, it isn't implausible that the country with the largest military would be motivated to use that military to defend its economic position. It's also not entirely crazy to think that other nations would be terrified of a country with a massive military falling on hard times. Countries with lots of guns and lots of desperation do not tend to make decisions that are good for everyone else.
These types of moves have been standard operating procedures for all the great nations since the dawn of time.
The health of the US depends on the trade of oil for dollars, just like the turn of the world depends on energy...
This petro-dollar system helps establish the dollar as the world's default currency, and regulates it dominance.
If you don't think we are going to eliminate anyone that tries to inject a non-dollar currency as a trade for oil, especially in the middle east, then you live in a fantasy world.
That entire region has been destabilized for the benefit of the US for the last 50 years.
It's much easier to come in and take (buy, transfer, etc) the oil when those nations are in ruin, then it is when a strong leadership is present.
The moment that leadership decides to trade oil for non-dollars, or even worse, under a gold-standard (non-fiat, non-debt system), then you start seeing on CNN and Fox News stories of all the innocent people being killed by "despot" monsters, and all our useful-idiots begin their war chants.
