According to tradition in belgium, how does st. nicholas travel from house to house delivering gifts to children?

i bought a new phone

explanation:

i will send you the money when i get back from lunch

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.