> Military service was one way, not the only way

In the book it was said that if a blind deaf person in a wheelchair volunteered for service, the state would find something for them to do. Maybe tediously counting hairs on a caterpillar, or testing chairs in Antarctica.

Now for me the asspull from Starship Troopers that I still think about every now and then was the notion of mathematical proofs of morality at a high school level (or any academic level, for that matter). This was a society that somehow discovered provable objective morality, and I really wish that idea could have been fleshed out more by Heinlein.