Certainly there is value in facilitating the "world's money flows"? Agreed that using taxpayer money to gamble is "disgusting" but surely the companies that do the things we all know and love (google, apple, etc) have benefited from the capital markets, and thus big banks like JPM. Without being public companies could google and apple have become what they are today?
Why is this "disgusting"? As long as they don't come to the taxpayers for a bailout it's somebody else's problem, namely JPM shareholders.