South Africa’s labor union movement is damaging industrial relations that have exacerbated widespread strikes in the continent’s largest economy, according to Trevor Manuel, a minister in President Jacob Zuma’s office.

Divisions at the Association of Mineworkers and Construction Union and the ruling African National Congress-aligned Confederation of South African Trade Unions have helped to create a dysfunctional labor market, Manuel told Bloomberg TV Africa at the World Economic Forum in Davos, Switzerland Jan. 24. At least 70,000 workers at the world’s three biggest platinum producers are currently on strike, while employees at the automaking, construction and aviation industries were among those that staged walkouts last year.