reflected the chauvinism of the nationalist, technocratic exceptionalism of the '50s -better living through chemistry, etc that presaged the rise of the military industrial complex and corporatism masking itself as progress.
Oh, yeah, that's Heinlein, all right, as exemplified by his very next book, Stranger in a Strange Land.
Look, Robert Heinlein was a writer of speculative fiction. The whole damn point was to extrapolate, odd consequences included. Which is why you get such radically different results (Double Star, Starship Troopers, Stranger in a Strange Land, and The Moon is a Harsh Mistress, for example, all having completely incompatible takes on modern democracy) depending on what premises Heinlein was playing with at the time.
Ideally making the point to the thoughtful reader that the reader's society and that society's accepted theories, conscious and unconscious, are just as guilty of absurdities as those explored in the books. But some readers are too dense to notice that, and some are so invested in the propriety of their absurdities that they abandon all rational thought in their defensive denouncements.