In South Africa there is another issue.
South Africans are very into keeping up appearances and hate it when someone has more money than they do, are better than them, etc..
This is what happens in the workplace often. Someone works hard and achieves an outstanding result. The others get a chip on the shoulder and then sometimes (not always) get nasty- I have worked for two companies where this has happened, separately. First company was back in 2004, boss kid was working there too, he got a blood nose because I did a project finished in 6 months, and from then on eventually I was forced to leave the company- they made my life hell. So much was the offense taken that 3 YEARS AFTER I LEFT THEY TRIED TO TAKE ME TO COURT, CLAIMING I STOLE THEIR IP.
Second company, after a few years I did something cool, to do with encryption... boom... company owner's got a chip on his shoulder. I had to pack my bag and leave. He then accused me of sabotage, I just blocked his number, ignored him and moved on, never heard of him again...