This is a very common scene in Palembang. These pickup trucks are often over loaded with goods, people and sometimes goods AND people. Even if they aren't overloaded, I've seen families go out and put their kids in the back. No such thing as a child being in a car seat over here. They can't understand why I restrain Aaron that way and let him cry all the way to our destination.
Luckily, the traffic is usually too heavy for anybody to go faster than about 50km/h but that doesn't mean its safe.