Every person administering aid under any public assistance program shall conduct himself with courtesy, consideration, and respect toward applicants for and recipients of aid under that program, and shall endeavor at all times to perform his duties in such manner as to secure for every person the amount of aid to which he is entitled, without attempting to elicit any information not necessary to carry out the provisions of law applicable to the program, and without comment or criticism of any fact concerning applicants or recipients not directly related to the administration of the program.