I think the point is that they will likely destabilise long before they run out of oil. The price/demand/Saudi's share of OPEC's allowance will mean that the d

I think the point is that they will likely destabilise long before they run out of oil. The price/demand/Saudi's share of OPEC's allowance will mean that the dire economic situation that you describe will play out no matter how much oil they have left. Whether that's true or not, I don't know, but that's what I understood from the OP's post.