Britain has been enriching itself using outright aggression prior to WW2, and since then using its influence in the global monetary system.
Mexico, Bangladesh and india has been for years trying to pursuade the british govt to help them get all the black money locked up in the UK back to them. And I am not sure what is going on with all the Russian black money. The Saudis too use London to hide their petroldollars and so do countless african dictators and terrorist organiznations.
It will be sweet to watch when the chickens come home to roost.