Sallie Krawcheck's had some time to think over what's wrong with the banking industry in the year since Bank of America fired her.

Yes, bankers are overpaid. Yes, they're greedy. But setting those flaws aside, myopic shareholder capitalism is failing, inadequate diversity is causing C-suite groupthink, and regulators are unwisely "attacking complexity with complexity," she said on Monday at a Harvard Business School talk in New York.

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