The governing authority of any municipality or county in this state is authorized and empowered, in its discretion, to expend such funds as it deems necessary and desirable, from any available funds of the municipality or county, to: (a) match any state, federal or private funds available for any program administered by the State Department of Public Welfare or the county departments of public welfare in this state; and/or (b) make a voluntary contribution to any such program.