Mate, central bankers are neither the owners of the institutions they worked for nor necessarily super-rich people, and as far as Powell is concerned he may even not be super-rich because as you said his net wealth is estimated at any point between 20 to 55 million while a super-rich is a person with at least a net wealth of 30 million. You must remember that there are thousands of central bankers around the world if we define a central banker as a member of the board of a central bank and very few would be super-rich.
Central banks do collaborate with one another but they also fail to do so or even antagonize one another. During the GFC the FED swapped freshly minted 750 billion dollars with an equivalent amount of freshly minted euros for the purpose of becoming via the ECB a de facto bank of last resort to the eurodollar system. However one common criticism made by people in the US is that the central bank of China has been a currency manipulator, an important reason behind the persistent trade deficit in the balance of trade of the US.
The strongest example of collaboration between central banks can be found in the formation of the Federal Reserve System and that of the Eurosystem, the former composed by 12 different central banks (Reserve Bank of New York, San. Francisco, Dallas, etc) and the latter by 19 European central banks (Bank of Portugal, France, Italy, etc). However in both cases that was in response to economic and political imperatives and not due to a deliberation made by a group of bankers getting together for the purpose of individual enrichment or a power grab or both.
During Bill Clinton's campaign to depose George Bush Senior one of his advisers wrote on a board at the campaign headquarters the following: "the economy, stupid", and he did so with the intention to make it clear to people that the attack on Bush should be about the way that he had managed the economy.
In relation to what has been going on I think that what the remainder should be saying is this: "the capitalist system, stupid", no punt intended, because this story about central banks including the idea being exposed by some lunatics that Rothschild family controls every central bank in the world is nothing but the product of a diversionary tactic. And it is this in my opinion what you should have said.
