Many Banks, especially Swiss,  are holding gold, money and material looted by the Nazis before and during WW2.  Squirming, sliding and slithering around  behind a legal smokescreen of confidentiality, they have kept it, only releasing it to it's true owners when compelled to do so.  During the war, the Swiss banks kept funds for American and other multinational companies for goods and services rendered to the Nazis after treating with the enemy laws came into effect.   They have behaved like robber barons, without conscience or scruple throughout their existence. 

Do we really expect today's bankers to be anything other than the same?   Transparency, I very much doubt it.