You'd be surprised:

https://en.wikipedia.org/wiki/List_of_minimum_wages_by_count...

It is certainly possible to meet all of one's nutritional requirements on 1 USD per day of food, especially if you have a chicken to provide eggs.

If working 48 hour weeks, 1 USD per hour is $208 per month, which is a modestly good wage in some places. Not really the minimum, although probably so for a very dirty and unpleasant job in a recycling factory.

About 80% of the world lives on less that $10 per day, and about half live on less than $2.50 per day.