The council is hereby authorized and empowered to levy annually a tax on all the property of the county assessed for county tax purposes an amount sufficient for carrying out the following charitable and social relief functions: Extending relief to and providing for the care and maintenance of indigent persons, including care at state or other hospitals; providing public work for the unemployed in times of economic emergency; providing for the care and maintenance of children who are without proper care and guardianship and without adequate support; and other family guardianship and without adequate support; and other family welfare and general charitable and social relief activities. (Mont. Co. Code 1965, § 20-1; 1929, ch. 297, § 1; 1933, ch. 444, § 239.)