A decision by Coca-Cola Co’s chief executive to decline his 2014 bonus did not go far enough, a well-known pay critic said Friday, indicating the company could face more scrutiny of its compensation ahead of its shareholder meeting this spring. While Coke Chairman and Chief Executive Muhtar Kent declined a $2.5 million bonus, that amount was offset by increases in the value of his stock-based awards, said David Winters, whose Wintergreen Advisers owns about 2.5 million Coke shares.