25th December 2017 From Sri Lanka, Colombo
Once the Minimum Wages are fixed under the Minimum Wages Act,1948 by the Appropriate Government for any employment in an industry, the status of that employment such as permanent, temporary, contractual or casual does not matter. The employer has the option in respect of the mode of payment only if it is different from the mode of payment based on which the statutory rate is fixed. In other words, if the minimum wages are at monthly rate, you have to divide it by 26 to arrive at the daily rate and if it is at daily rate, you have to multiply it by 30 to arrive at the monthly rate.
But it is discernible from your post that the monthly wages are more than the minimum wages but the casual wages are less than the monthly wages on pro-rata basis. What is important in such a situation is that the casual wages should not be less than the minimum wages.
25th December 2017 From India, Salem