It's all so esoteric
Hell, one of his other early stories inverted this setup and had a society where they had referendums on whether to go to war, and if the referendums passed, everyone who voted for the war was drafted.But I think in general its telling that Heinlein did the whole thing he did in ST once; none of his other SF governments look at all like it.
Sometimes they mention The Moon is a Harsh Mistress, but mainly to do the incoherent libertarians-are-secret-fascists business. They tend to miss that in that book, he literally has a force of power-armored troopers of the Earth government show up and massacre a lot of civilians, including someone in the protagonist's family. The man had themes, but he contained multitudes.But the book and the Mobile Infantry definitely attract more discussion today than say, the Space Patrol (from Heinlein’s novel Space Cadet), a military organization devoted solely to keeping the peace. Nobody talks about Patrol officer John Ezra Dahlquist, the protagonist of “The Long Watch”, who sacrificed his life to stop a military coup by his fellow officers.
Yup. Someone mentioned stories with voting tests from 80s Analog, and I remember how those were almost all, "Let's keep the ignorant, warlike conservatives from voting so they can't start a nuclear war!". I remember one* had a woman living in a lunar colony** trying to defend their literacy tests to an explicitly Republican congressman.I mean, on one hand, it's a tempting thought isn't it? What if all the idiots and the assholes just couldn't vote? What if there were hoops you had to jump through- not like that, ones that actually tested your character this time- that would weed them out and only true patriots could get a say in the issues that affect us all. I've seen people across the political spectrum indulge in that fantasy.
* I'm blanking on the writer, but it was in a series of stories about a future astronaut who became a nearly full-conversion cyborg after massive radiation dosage. Rather realistically done, with her basically being assembled out of off-the-shelf prosthetics and dealing with everyone having uncanny-valley reactions to her.
** It was weird because there were only a few young children as second-generation colonists, and the first-generation colonists were all astronauts and scientists. Why would anyone need testing, if you accepted some need?