Being rich is not always good in long term.
“Saudi Arabia is burning a huge share of its revenue in subsidizing its population, either directly, or indirectly via unproductive public jobs.All this work performed by millions of people… You can’t tax that. You’re using your government revenue to pay for them! How is Saudi Arabia supposed to maintain this level of spending if oil revenue drops?”
https://unchartedterritories.tomaspueyo.com/p/saudi-arabias-ordeal