Given that we have a limited number of productive hours per day, say 3-4, the overall performance is better with 5-day workweek. Add 2-3 hours of tuning your mi

Given that we have a limited number of productive hours per day, say 3-4, the overall performance is better with 5-day workweek. Add 2-3 hours of tuning your mind, meetings, emails, etc. Which gives 5-7 hours. In line with what you said. So, next time you negotiate a raise with you manager, ask for less hours instead of more $$$.