I don't think in this world there are any jobs that don't require energy. The labor market is highly competitive nowadays, so no matter which company you are in, you must spare no efforts to create value for the company. Companies don't pay for idle staffs. Every penny a company spends is an investment wanting reward. Besides, if an employee is not energetic, the superiors of the company might be concerned that this kind of attitude gets contagious and passed onto other employees. They will sack the person immediately.