The department is authorized to provide such social and related services as are reasonably necessary to encourage the care of dependent children in their own homes or in the homes of relatives, to help maintain and strengthen family life and to help such parents or relatives to attain maximum self-support and personal independence consistent with the maintenance of continuing parental care and protection. In the provision of such services, maximum utilization of other agencies providing similar or related services shall be effected.
RCW 74.12.240