There's a large cultural difference. Many guys and girls on asia use web cafes. When they later get own connection theres not usually enough ip's. You're talking about billions of people. Not everyone is going to have their own ip address from that pool.
I come from an Asian country with mostly shared ip address space. The divitation was never honest. It was first-come-first-serve. Both US and UK have lots of ip addresses to use, and it's wrong. Asia has much larger population too! I don't expect any new change to it, but just stating the facts.