There is hereby established the division of human resources in the office of the governor, which is authorized and directed to administer a personnel system, including the provision of personal and professional training, for state of Idaho employees as set forth in this chapter. The purpose of said personnel system is to provide a means whereby classified employees of the state of Idaho shall be examined, selected, retained and promoted on the basis of merit and their performance of duties, thus effecting economy and efficiency in the administration of state government. The legislature declares that, in its considered judgment, the public good and the general welfare of the citizens of this state require enactment of this measure, under the powers of the state.