Follow the money is an easy way to find the source of much of the corruption in the world.
When you do, and follow it high enough, it all seems to lead back to the same locations.
There are many YT videos where researchers have done exactly this.
The London, London - a separate state - figures strongly in the picture.
This goes even higher than the USA Fed (a private company) with a huge % wise number of accountants dreaming up new & innovative ways to launder the profits from their ventures.
The Cayman Islands are just one example of how this is done.