Last week's World Economic Forum (WEF)-Africa conference in Durban hosted some of the world’s most controversial politicians: not just Jacob Zuma and his finance minister Malusi Gigaba plus regional dictators Robert Mugabe, Yoweri Museveni, King Mswati and Edgar Lungu, but also the most powerful man in Europe, the notoriously-corrupt neoliberal German finance minister, Wolfgang Schäuble.