The provisions of Sections 47-5-301 through 47-5-327 shall be liberally construed to achieve the primary objective of vocational training and rehabilitation of offenders through work in industrial types of activities which also will best serve the economical and efficient operation of state agencies. The provisions of Sections 47-5-301 through 47-5-327 shall be considered as supplementary, or in addition to, other existing provisions of law relative to the employment of offenders.