It's wrong to treat people differently because of their age.
Karl is assigning tasks to the people who work for him.
Karl wants to make sure he reaches his production goal.
Mike gives all his workers an equal work load to perform.
Karl gives his oldest workers fewer tasks to complete because he thinks they can't do the work quickly.
Karl reaches his production goal because all his employees work equally hard.
Karl experiences a production slow-down by his younger workers are mad they must do more work and doesn't reach his production goal.