What makes you think we aren't now? Iran and Saudi are on the verge of collapse. The only thing keeping them afloat is us.
Remember we created Saddam. We created the Shah. And we created SA.
Simply put we have to look at this as a colonial burp rather than a cause. To commit to the levels we had in the 90's is not cost effective.
We're stretched thin.
And [if] we [created] Saddam, then it is our responsibility to dispatch him.