extreme case would be in China. One child, 4 grandparents to spoil the child. You get little emperor.
My children don't scream when they were young, and I don't have any maid to help. The best way to teach the children is be a good example for them because they will see how you talk and how you treat other people, and imitate you.
From my own experience, I think it’s good to treat kids as adults from the very beginning – they actually can sense a lot of things and it’s better to provide transparency / visibility / reasoning than to only provide partial facts and leave them wondering how to behave.