Where is the extra pay?
Several posts indicate the figure of 1.5 * pay. The company I work for also pays 1.5 times the day rate (monthly salary divided by average monthly working days of approximately 20). The normal work day to off day ratio is 2:1. Which means that every day you work 'earns' 1/2 off day. Working an off day means: loosing one day and not getting the 'earned' 1/2 day....total 1.5 days. In other word break even (except for some per diem).
Greetz,
G.D.