You keep asserting that SA is a very rich country. How are you measuring that?
The IMF have them at 29th by GDP or about a fifth the size of the UK economy. Not poor, but not very rich either. Anyhow, as Jake says, our aid is more to do with influence and trading than alleviating poverty.
Labour says the decision was wrong. They criticised the Minister, but then they would they are the official opposition party. And they criticised the messy way it was done diplomatically.
What is unclear, is why policy has changed. The Conservatives and LibDems have been happy to pay these last 3 years. And SA has not sudden taken a great leap in their economy.
The day before polling in the Local elections seems highly coincidental to be delivering headlines about 'cutting aid' and pretty cynical when the total amount in aid is still ring fenced.