As protesters rallied against income inequality, shareholders of the banking giant Citigroup held a landmark vote rejecting a $15 million payday for chief executive Vikram Pandit. It’s the first time stock owners at a financial sector titan have united to vote down a massive compensation package for an executive. A principal at a firm controlling five million Citigroup shares told the New York Times, “CEOs deserve good pay — but there’s good pay and there’s obscene pay.”