also this NOC system for exiting , its like a master who wants to keep his slave in his custody . it is only in practiced in muslim countries like KSA and Qatar only .
i believe this came from the slavery system . Like slavery not prohibited by holy scriptures of haddiths .

Yesterday one of labor's wife got an accident in his country , and she is in coma . so this poor labor wants go back and meet his wife before she dies for his last chance in life . unfortunately his sponsor outside country and he cannot make the letter until now . so he is still waiting what else he can do in this world of selfish people

i really wish if there is GOD