I feel compelled to make the very-adjacent-to-the-article statement that "Starship Troopers" is not an adaptation of the novel, but at best a vacuum-forming of another script into the space of Starship Troopers.

IIRC, the original script was called something like "Bug Hunt at Outpost 9" and someone at the studio said "Hey, we can get the rights to Starship Troopers and this thing will sell better."