Deutsche Bank CEO Christian Sewing on Wednesday urged Germans to work harder to help restore the country’s economy. “Investors are already doubting our ability to reform, but especially our ability and our will to perform,” Sewing said at the Handelsblatt banking summit in Frankfurt. “More growth in Germany will come only if we also change our attitude to work; if we are prepared to work differently, but overall to work more and harder.” Sewing said that EU citizens work about 34 hours a week on average compared with about 28 hours in Germany. He argued that Germany should embrace longer…