Which amendment expanded the right to vote to about half the population?

The 19th amendment expanded the right to vote to about half the population. 15th amendment may increase the voting population. Hope this helped! ;)

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.