Congress MP Karti Chidambaram has criticised Infosys co-founder NR Narayana Murthy's proposal to work for 70 hours per week, stressing on the focus of efficiency instead of "meaninglessly" working for long hours. Last month, Murthy stood firm on his stance of working 70 hours a week that had earlier snowballed into a topic of debate. The Infosys co-founder further said …