The teaching hospital and related facilities shall be utilized to serve the people of Mississippi generally. The teaching hospital and related facilities shall have the power necessary to enter into group purchasing arrangements as deemed reasonable and necessary, and such powers as are necessary to establish and operate health maintenance organizations, preferred provider organizations, prepaid health benefit plans and other managed care entities regulated by Section 83-41-301 et seq., and the power to establish rates and charges for health care services, either on a fee for service, discounted, capitated or other risk based payment basis, and provided that any such entity shall primarily provide care and services to indigent persons or qualified beneficiaries of the State Medicaid Program; and further provided, however, any entity, or any affiliate of any such entity, that now or in the future provides management services to the University of Mississippi Medical Center or any of its facilities, shall not be affiliated in any manner with any managed care product established by the University of Mississippi Medical Center under the authority of this section. There shall be a reasonable volume of free work; however, said volume shall never be less than one-half of its bed capacity for indigent patients who are eligible and qualified under the state charity fund for charity hospitalization of indigent persons, or qualified beneficiaries of the State Medicaid Program. The income derived from the operations of said hospital, including all facilities thereof, shall be utilized toward the payment of the operating expenses of said hospital, including all facilities thereof.