(1) It is declared that the public welfare is served by the making of premium rates for workmen’s [worker’s] compensation insurance coverages in concert, and that the review by the state of the rates so made is necessary and desirable in the public interest.
(2) It is the purpose of this chapter: To authorize such rate-making in concert, and the operation of rating organizations relative thereto;
(3) To establish the general bases and standards for the making of such rates;
(4) To provide for review by the state of such rate-making and the results thereof.