I did make a mistake: I meant $1 an hour. When writing of international poverty, “$1 a day” is such a famous standard, it kind of rolls off my fingertips.
As for the $2.68 to $4.09, I’ll admit that I had presumed that the hourly wage hadn’t increased since the US minimum had. I’d be very interested in knowing where you got your information, not because I mistrust you, but because I’d like to have more details.
I took it from the article linked to in post 12.
http://www.nysun.com/article/46644