I love the film, even though it's a dumbed down bastardisation of the book. There's no way we'll ever get a true adaptation from Hollywood. It would be way too controversial for anybody in the liberal media to touch it. Paul Verhoven was accused of making a fascist film by the media when he made his version. Even though it's fucking obviously a spoof of the novel that holds it in contempt. He has Neil Patrick Harris dress like a Nazi!
Indeed, Verhoeven -- who lived through the Nazi occupation of the Netherlands as a child -- said in the documentary series The Story of Film that his initial inspiration was to do a movie about young men in the 1930s who decide to join the military and come of age and grow into men... in the service of the Third Reich -- a critique of gung-ho film jingoism.
His Starship Troopers film is essence an argument about what kind of society the Terran Federation would be -- less an adaptation than a commentary.
Though I don't agree that a straight adaptation would never find purchase. From what I understand, the various "sequels" to Verhoeven's film lack its sense of self-awareness and satire.