The critique is even more devastating because the governmental actors and actions in the book look and feel so authentic and familiar. Cornelius Fudge, the original Minister of Magic, perfectly fits our notion of a bumbling politician just trying to hang onto his job. Delores Umbridge is the classic small-minded bureaucrat who only cares about rules, discipline, and her own power. Rufus Scrimgeour is a George Bush-like war leader, inspiring confidence through his steely resolve. The Ministry itself is made up of various sub-ministries with goofy names (e.g., The Goblin Liaison Office or the Ludicrous Patents Office) enforcing silly sounding regulations (e.g., The Decree for the Treatment of Non-Wizard Part-Humans or The Decree for the Reasonable Restriction of Underage Sorcery). These descriptions of government jibe with our own sarcastic views of bureaucracy and bureaucrats: bureaucrats tend to be amusing characters that propagate and enforce laws of limited utility with unwieldy names. When you combine the light-hearted satire with the above list of government activities, however, Rowling's critique of government becomes substantially darker and more powerful.
The reach of the Harry Potter books is fantastic. To have children grow up reading them and coming to the realization that most government is part incompetent fumbling, part self-sustaining and self-interested bureaucracy, and part jobs program for social climbers is not at all bad.