The ANC has called for a boycott of SA wines.
A boycott of SA wines will result in demand for SA wine dropping, which will ripple through to lower wages for farm workers (and other factors of production used to produce wine). It could even result in the closure of SA wine farms and thousands of job losses.
The reality is if the ANC wants workers on SA wine farms to earn more money, they should be calling for a boycott of all foreign wines. They should encourage people not to drink anything but SA wine! This will have the effect of bidding up the cost of labour used to produce wine.
Of course I disagree with this but it is to illustrate the idiocy of the ANC. This is a disastrous idea if the intention is to drive the wages of workers on wine farms higher.