Sounds like a decent wage for that part of the world. Looks like on the medium-high end folks are making $600 a month there. Not sure how many hours worked but conservatively towards the high end that works out to $3-4 an hour.
I think it's actually a bad idea to pay much more than that. If you do then local companies can no longer compete for these workers because they could not afford them, and once used to a high salary the workers would not want to work for less.
The article says $200 a month for the AI annotation job in Uganda. Median income appears to be $70(2012 data, so maybe now $100 after inflation)
Minimum wage is 120 so at normal hours 160 is above but also not massively
What does $600/mo afford people over there that they can't get with $300/mo, $150/mo, $75/mo, etc?
A bigger house with tap water, indoor plumbing and electricity, a fridge, and maybe even a stove or a washing machine. Oh, and they can send their kids to a better school.