No, the takeaway from this is that the book contradicts itself. In the story proper, a necessarily small elite veteran electorate votes. In a few throwaway lines, the opposite is asserted, despite being impossible in story terms.
I can't concur. You make your case that parasitic HAS to mean small. Clearly that is not the case, as any dozen dictionaries could assert - it can also mean 'taking undue amounts of resources away, leachlike'. Yes, the electorate is smaller than the citizenry, that doesn't mean it's small in relative terms - so is ours.
So we don't know what he meant based on that one word. No other reference of the franchise being small exists in the book. You predicate the entire premise on one specific word that can have more than one meaning.
In contradiction to your assumption (not the work itself), we have two statements on the franchise, one that too many people are getting it these days in the opinion of one veteran, and another that the majority of people who get it didn't serve in the military branch.
Heinlein states that was his intent, and while the book isn't about the non-military Federal Service, we know it exists, we know it is larger than the military, and we know that Rico's best friend joins it - the one who talked him into service in the first place. Unlike the movie, it's a pure research job in electronics, not an SS position, and Carl dies on Pluto when the Bugs attack the research station there. He doesn't get his franchise.
Having this explicit evidence clearly overwhelms the dubious assertion that parasitic has to mean 'small' in absolute term - it doesn't. Humanity could be termed parasitic to the Earth's ecological balance - that doesn't mean we are tiny.
The father's reference to parasitism has to do with the uselessness (in his POV) of Federal Service, especially in peace time, not the smallness of it. He states he'd support Johnn joining the MI if there was a war. And he states that no Rico has held the franchise in a hundred years and they have done quite well for themselves. Just as many people in our society don't vote, yet still have happy and contented lives.
The reference I asked had to do with contractors providing support services at Heinlein's version of OCS, which again shows that there are very few military services proper. Which means there cannot be a large number of veteran electors.
You are mistaken. OCS was staffed by disabled veterans in teaching positions. You are probably thinking of the fleet depot Sanctuary. Yes, there were civilians there, over a million. It's a colony after all. It says about half of those are employed in some manner by the Federal service.
Of course, this is the secret base where society is supposed to continue if Earth is wiped out, and it's well into the war, so I'd imagine more people are going into the MI at that point as compared to administrative roles.
Ultimately, it's no proof whatsoever of anything - it's a small colony that is definitely not typical in any way of the society as a whole.
I never said anything of the sort, and I explicitly stated this is the opposite of what I said. This is even worse than the assumption that a SF writer wouldn't know that the scientific meaning of "parasite" implies small. Or imagine that a businessman wouldn't know terms like "freeloaders" or "bums" or "timeservers" or, even, if he wanted to get fancy, "sinecures."
When you have to make stuff up, it means you've run out of real argument.
Yes, you just ignore the circle you form with your logic. Rico is stupid, therefore he can only be assigned MI. MI is the lowest branch of the Service (though it clearly states that isn't the case in the novel) therefore stupid people get assigned to it.
Rico isn't stupid, though he's ignorant and naive as any 18 year old is in many ways (especially pre-communications age, which of course doesn't show in the book). And the MI is clearly a higher level of service than the non-military, which is numerically superior.
The upshot of it all is that you think it's just dandy for a man to tell children that there's not really any thing such as human rights,
Inalienable human rights are a construct, as Heinlein points out. It is advantageous for our own well being to assume that construct exists, but clearly such a construct is defined by men, not nature or a higher power. As such, they are capable of being revoked. Understanding that it isn't somehow built into the nature of reality is the first step in understanding they can be taken away, and why it is necessary to fight for said construct.
that violence is the final arbiter
It certainly can be, as any reading of history will assert. Ultimately what stops it from being the final arbiter is our own humanity, and what we are willing to do.
and genocide is just a strategy.
I think you'll find even in our rarefied Western democracy, if a group annihilated one of our cities with a WMD there'd be a substantial response. LOL.
And of course that misses the point of the MI itself. The culmination of the book is the capture of a Brain Bug. Why is this pertinent? Because it is necessary to understand their society and sociology, so communications can be formed. Communications so they can learn why the Bugs fight - and get them to not fight in the future.
Weapons capable of destroying planets are available to the Navy in the book, yet they don't use those. Because they need someone to go in and capture a Brain, which they hope will lead to communications between the societies.
This is explicitly stated, once again.