Why did congress pass the twenty-second admendment

The congress passed the twenty-second amendment because after the death of President Franklin Delano Roosevelt, the people realized having the same president for more than eight years was bad for the country.

Because they realized that having the same president for more that 8 years ( 4 years in each term) was bad.

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.