This being the case of individuals, think about the corporates, who always us for their work to be done. You know, Saturday is the hectic day for us being it half day in Banking. If its holiday, i cant imagine it. Inspite of strikes and other things for getting it done, my mind says it will not be wiser option for a country like ours.
There are people who ask whether the bank is working even on national holidays like diwali, pongal. How cum the idea of 5 day banking.