The reason why they want employees to work more is because they have skills and experience related to their job and they'll get more productive work done if you

The reason why they want employees to work more is because they have skills and experience related to their job and they'll get more productive work done if you just get them to work 8 hours a day instead of going through the cost of hiring someone new for 4 hours a day. Each employee has a fixed cost in recruitment, training, management, turnover, per person costs and more that doesn't go away.