That's not gonna happen. Saudi is not gonna drop the dollar because it needs Uncle Sam to protect it from the big bad Shi'ites in Iran and help fund/train its terrorist shock troops in the Islamic world to maintain its regional influence. Saudis would rather murder fellow Muslims than drop the dollar. As soon as they even hint at attempting to drop the dollar you will see a Nato "democracy" intervention in no time
.
America will do what's in its interest. What's stopping wealthy Arab Muslims from doing what's in the interest of their people? As
@Nilgiri rightfully said, don't blame the incompetence and corruption of wealthy Muslim leaders on America.