There is hereby established, within and as a part of the Kansas department for aging and disability services and under the supervision of the secretary for aging and disability services, services for mental health and developmental disabilities, the head of which shall be the commissioner of community services and programs. Under the supervision of the secretary for aging and disability services, the commissioner of community services and programs shall administer services for mental health and developmental disabilities. The secretary for aging and disability services shall appoint the commissioner of community services and programs, and the commissioner shall serve at the pleasure of the secretary for aging and disability services. The commissioner of community services and programs shall be in the unclassified service of the Kansas civil service act and shall receive an annual salary fixed by the secretary for aging and disability services and approved by the governor.