Do we need child labor laws? In countries that are reach enough to have various forms of social security there is no need to send little Timmy to work in a coal

Do we need child labor laws? In countries that are reach enough to have various forms of social security there is no need to send little Timmy to work in a coal mine. In countries that aren't - they do help their parents with sustenance farming and those laws, even if they exist on some level, don't change anything.