Dave & Co have probably been the worst offenders in recent recent years for selling public assets and companies they have nationalized to buddies of theirs at massively discounted prices, beginning with the RBS.
"Oliver Holbourn, head of market investments at UKFI, said some City firms had even offered to pay the government to work on its privatisations."
"The banks, however, eventually concluded that such arrangements could be an offence under the US foreign corrupt practices act."
https://www.theguardian.com/business/2015/sep/08/mps-warn-uk...
What? I guess you have much evidence.
http://www.express.co.uk/finance/city/595769/RBS-privatisati...
I think anyone who had RBS shares before the bailout might disagree with you on that point!
Also, I wonder who the single largest shareholder of UK banks might be?
So what? Money corrupts, this is not news. In any economy where you have regions of the world that specialise, there will be regions with lots of banks.
But banks' trustees aren't the public. It's their depositors, shareholders and customers. And by most accounts, they serve those reasonably well.
So yeah, they could maybe make a case that Britain is the most corrupting country in the world. But that is not the same thing. Compared to other nations, Britain's public trustees probably aren't so bad at serving the interests of the public.