PL HELP MEEE NO “Bob Dylan was right when he said ‘Everyone has to serve someone’. We may belong to a lower caste, but at least we are not at the very bottom of the barrel. If we do all of our 6th grade Ancient History classwork, perhaps we will have good karma and the next life will improve.”

This speaker belongs to the caste, this is true because

Clean air provides nitrogen

An informal structure in a bureaucracy would be something like so-called "office politics". where there's a formal structure set up for the organization, but then an informal subculture as well that has a way of organizing the bureaucracy further. this can be positive because it sets up an added degree of organization, albeit informal, within the bureaucracy.