“It could implode and crush the royal family soon”
Never happen. The Royal Family will be living high in Vienna with the family cash safely stashed when the kingdom is overrun by Allah’s army.
While I agree with what you said, I don’t believe it is going to come to that in the next decade. Long before Saudi would “fall”, others would collapse dropping oil supply and increasing prices.
This is a from late last year I think, but most of this is still in reason.
http://graphics.wsj.com/lists/opec-meeting
Algeria
Oil price needed to balance fiscal 2015 budget:
$130.50
Angola
Oil price needed to balance fiscal 2014 budget:
$98.00
Ecuador
Oil price needed to balance fiscal 2015 budget:
$79.70
Iran
Oil price needed to balance fiscal 2015 budget:
$130.70
Iraq
Oil price needed to balance fiscal 2015 budget:
$100.60
Kuwait
Oil price needed to balance fiscal 2015 budget:
$54.00
Libya
Oil price needed to balance fiscal 2015 budget:
$184.10
Nigeria
Oil price needed to balance fiscal 2015 budget:
$122.70
Qatar
Oil price needed to balance fiscal 2015 budget:
$60.00
Saudi Arabia
Oil price needed to balance fiscal 2015 budget:
$106.00
United Arab Emirates
Oil price needed to balance fiscal 2015 budget:
$77.30
Venezuela
Oil price needed to balance fiscal 2015 budget:
$117.50
Note that in addition to the cash flow issue created by spending and oil price, you also have to consider financial strength before the price drop including cash reserves. That is where Saudi Arabia is strongest of the bunch.