At first blush this might seem counter productive in regard to heating, cooling, guards, etc. However if a cost analysis were undertaken it might prove otherwise. Powering up and cooling/heating buildings after two day of downtime can be very expensive. Allow the work week to consist of all 7 days of the week. If Saturday and Sunday were included as work options it would allow for less need for absence from work for medical appointments and the like. It could allow for a reduction in childcare as two parents could be home with a child four days a week. It would allow for less commuter congestion and parking issues. It would allow for enhanced production based on less congested office space and noise.