Is working long hours a sign of dedication or inefficiency?

FUTURE CA (student) (497 Points)

18 August 2013  
dear friends, as you all are aware, in the corporate world, it is common to find an employee working upto night 10 or 12 almost frequently. Please tell me whether this is dedication or inefficiency from the employee side.? From the company side is it fair to make employees work long hours? Will it not affect the work life balance of the employee? What are the employee's rights when he is forced to work long hours?