Been rather a lot of 'investments' in properties and securities that have also had the arse fall out of them due to the price drop. They're not the most competently run economy and the idea that they can just turn the taps off and see oil prices rise when they want to is naive - particularly...
Now that Saudi's broke due to oil prices, don't expect their usual "allies" to give two shits. Country is one of the worst as goes being stuck in the dark ages.