It seems that one of the rewards is the ability to see their parents. Even days with illness are deducted from the reward system.
It is an unfair system. Love and comfort can not be put in a schedule based on rewards and punishments. Love and comfort are unlimited.
This system should be revised. It is close to neglect against children already suffering from being forced to live outside their homes. It is not far from being child abuse.
Svenska barn kränks på barnhem (Expressen - in Swedish)