They tend to sputter when denouncing the very idea that Zimbabwe isn`t just South Africa with a 14 year head start. Everything is so different!
I`ve finally figured out one relevant difference. The old Rhodesians had to work, hard and competently, for their wealth. They were world class farmers, and then during the embargo of 1965-1980, they built up their own industries.
In contrast, much of South Africa`s economy is mineral, which generates huge profits with small skilled workforce; the mines wealth can paper over much shortfall in other parts of the economy.