Speaking generally, people seem to have unrealistic expectations about human institutions. Name a large one that isn't bureaucratic, that doesn't have inefficiencies of large organizations, and where its priority isn't loyalty to the institution itself (though Congress, consisting of elected people nationwide, might be an exception to that).

Not all institutions are the same; some are better than others and we shouldn't just accept problems and corruption. But why do people keep believing big talkers who say they're going to magically eliminate all those things and make it run like a hyper-efficient 5-person business?

IMHO, much of it is people looking to get elected by looking for problems and things to complain about, rather than looking how to get things done.

Without time to examine it in detail (I've got to run), I'd hypothesize that most of what's important in the world is accomplished and has been accomplished by large institutions.