You are not taking into account differences such as cost of life in the country. Almost every single country that has minimum wage, when brought back to US levels, has it higher than $4.4/h.
Minimum wage isn't a matter of having a certain amount of money. It's being able to live with dignity.
The reverse is people in countries with a low cost of living such as Indra or the Philippines come to work in Canada or the US. A $11 hour minimum wage here is probably equivalent to $50 hour back in the worker's home country.
Compare what rent or a house costs and food basics you'll see that to a worker quality of life depends on the minimum wage but mostly on the cost of living.
In many countries the "minimun wage" you like so much is less than $4.4/hour. Why do you think it is this way?