Well this is quite normal routine in almost all countries, and also in some private and government companies in Pakistan. At least the government could benefit a lot from that. Less transport shuttles required per week (20 % reduction in fuel). In some way, electricity requirement would be reduced but it is quite complicated to explain. Apparently, employees efficiency will reduce in case there is no sufficient break. Good thing for the employees: Two full days to enjoy with their family. Negative thing would be, one day absence will cost the employee more. I think companies with 5 working days / week are more efficient than others. Of course we are not talking about the businessmen or trade people since they don't fall in this category.