As I've read, he rules are generally the same in most (if not all) countries. The people of the countries care. They are just ignorant of what goes on. Similar to a situation where a person may not know that their neighbor is moleting his kids. Also, official are paid off. Some children are taken. and you're right traditions are different. Parents in some countries sell their children into slavery to feed the rest if the family is in dire need. They are told that their children are household helpers (maids) to rich families. The children won't run away because of duty (and shame and a lack of resources). There will alway be a supply for demand. Stop the demand and you stop the supply.