And it is based on caloric consumption as well as monthly incomes. Most international experts agree that 2550 calories per day is considered the line. In terms of income, it is still 38% for Pak and 28% for India.
BTW, Shaukat Aziz ‘reduced’ Pakistan’s poverty during the last survey by changing the line to 2350 calories.
BTW, Geneva Convention states that prisoners should get about 3500 calories per day, FYI.