Pushing people off their land drives more conflict over land rights on the continent than any other factor.
Operations at the mine in northern South Africa ceased in September 2016 after a combination of factors, including high operating costs.
Supporters of a minimum wage say it can stimulate growth as workers can spend more, as well as reducing inequality.
The singer, 58, was granted permission by Malawi's High Court this week to adopt the twin girls.
Barrow won a Dec. 1 election but Jammeh, who had ruled since seizing power in a coup in 1994, refused to step down.