Yep people usually need $1000 a year to live in Pakistan, this is the income of people which are matriculate, intermediate in education ( A/O level ) and doing job in any company. People which have done 16 years education earn 2000-2500 a year. Engineers i.e electrical and others earn $3000-5000 a year.
Even if he is living with his parents then he should been needing 200-300$ a month to support a family of 4-7 person. There must be someone in his family who is capable of doing any kind of simple work.
Just to also make a point for people living in the western world and probably some European as well: Many times when we see families from India or Pakistan or other Asian countries live here, we see them living with: Grandparents, parents, children all in same house forever.
Here in USA/Canada for example, you are considered a failure in life and shameful to live with your parents past age of 19 or 21 unless you are in full time university, then maybe until 24 at very latest. It is a completely different culture and people always wonder "How can someone survive on $1.00-$2.00 per hour? Well, if you have 2-4 working people in the family, it becomes much easier.
Here in North America, people complain "It is impossible for me to survive on Welfare, Only $500/Month." or "I can't survive on Minimum wage, only making $1000/month" and then they spend $200/month on Cigarettes and $200/month on alcohol and eat at restaurants 3 times per week for lunch.
People don't think: Maybe if I live with 3 individuals in 1 household, we can survive more comfortable. The governments here just say "OK, you can afford own apartment + alcohol + cigarettes? Let me increase your welfare for you." This doesn't help anyone. People on welfare should not get to enjoy the luxury of living alone.
But also, many parents here refuse to let their children live in their homes past age 20 as noted before, because its shameful. And many children refuse to offer to pay rent to parents, because they blame the parents for giving them life and say the parent should be 100% responsible for them (serious).
But back on topic, I agree, $600 month to live in Cambodia, something is not right here...lol.