The Iowa college work-study program is established to stimulate and promote the part-time employment of students attending Iowa postsecondary educational institutions, and the part-time or full-time summer employment of students registered for classes at Iowa postsecondary institutions during the succeeding school year, who are in need of employment earnings in order to pursue postsecondary education. The program shall be administered by the commission. The commission shall adopt rules under chapter 17A to carry out the program. The employment under the program shall be employment by the postsecondary education institution itself or work in a public agency or private nonprofit organization under a contract between the institution or the commission and the agency or organization. The work shall not result in the displacement of employed workers or impair or affect existing contracts for services. Moneys used by an institution for the work-study program shall supplement and not supplant jobs and existing financial aid programs provided for students through the institution.