It is hereby declared to be the purpose and intent of this chapter and the policy of the legislature to authorize qualified dentists engaged in private practice to provide adequate dental services for residents of this state through a sound prepayment plan with the cooperation of the Mississippi Dental Association and state board of dental examiners, with appropriate state supervision to insure that subscribers thereto will continue to receive the highest type professional dental care with their free and voluntary choice of dentists, and at the same time it is the purpose and intent of this chapter and the policy of the legislature to maintain the standing and promote the progress of the science and art of dental surgery in this state. The courts of this state are hereby directed to construe this chapter liberally in order to accomplish those ends.