Is it time yet for the Kingdom to tax this island? The King and Queen can easily declare that one of the prior siblings 2 to 16 be the new administrative liege of this island that is a socialist paradise. There is no money and everyone chooses to work or not work as much as they want. They then get to eat, sleep, and behave in society as they please according to the basic culture of the island. Another factor is that they regard others as being of other species and not the same race such as the orcs are not humans with a different skin just as kobolds are not regarded as humans with a different skin. They are all different species with different musculature and looks.