7-33-4128. Minimum wages of firefighters in cities of first and second class. After July 1, 1976, there shall be paid to each duly appointed and confirmed member of the fire departments of cities or towns of the first and second class of the state a minimum wage for a daily service of 8 consecutive hours of work of at least $750 per month for the first year of service and thereafter at least $750 per month plus 1% of said minimum base monthly salary for each additional year of service.