. Recall what group of Roman philosophers taught that people should not be concerned with possessions?

the stoics

Explanation:

the stoics were a group of philosophers that believed posessions weren't important and that emotion = suffering. to the stoics, men should live lives based on reason only, not emotions.

can you explain it better

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.