Correct. So have one instead that's out of their control
In the US the monetary system is legally under the control of the politicians. And I believe it’s that way everywhere in the world.
The Bretton Woods system was a partial gold standard that applied to foreign currency exchange, but the politicians found a way to cheat, so that failed. If you try to use an honest permanent gold standard that backs all currency you won’t have enough gold.
The only long term solution is a currency backed by goods and services combined with a well informed citizenry that holds politicians accountable.