Sure, but the median software engineer in South Africa is making around $20k USD (https://www.payscale.com/research/ZA/Job=Software_Engineer/S...) compared to around $90k in the US. Multiply that $16 by 4.5 and you're at $72, or $9/hour for a full day of work. Do a comparison based on percentage of salary, and the difference is smaller than you would think. It just seems ridiculously cheap in nominal terms.