All eligible officers and employees of the Court of Appeals, except the judges of that court, shall be subject to a merit system of personnel administration as promulgated by the Court of Appeals, under which all such officers and employees shall be selected on a basis of merit, fitness, and efficiency. All such officers and employees are authorized to become members of the retirement system. All contributions required by this chapter shall be paid from funds appropriated for the operation of the Court of Appeals and all such payments shall be in addition to the regular compensation allowed to such officers and employees.