It is hereby declared the purpose and policy of the state in supervising the directing of the welfare work therein, to provide an effective uniform system of welfare work for the state; to promote efficiency in the work; and to comply with the conditions provided for obtaining federal grants for welfare work as set forth in federal laws and federal rules and regulations. It is not the policy of the state to discourage or interfere with the universally recognized moral obligations of kindred to provide, when possible, for the support of dependent relatives, but rather it is the policy of the state to assist the needy and where necessary, the relatives in providing the necessary assistance for dependents.