Try reading up.
http://bankunderground.co.uk/2015/06/30/banks-are-not-interm...
In general, banks are not above criticism by any means, but making a throwaway statement about the existence of financial industry headquarters in a city being tantamount to Oppression is tendentious in the extreme. If one wishes to make that case in these pages while maintaining some semblance of rational discourse (as opposed to populist rhetoric and invective) then we should do so while identifying the assumptions and world-view which led to it, so that they can be properly understood and critiqued.
The UK launders loads of money through UK real-estate also. And helps the rich hide their money from their governments which would be redistributive.
Say what you like, the UK farms workers.