Heinlein’s ‘Starship Troopers’ had an interesting take on it.
I would argue that Heinlein had an excellent take on the matter.
Interesting ... yes.
Wrong, though, IMO ... and you'll recall that the only practical support he gave for his (fictional) take on it was that "it works". Well, DUH! Of course "it works". It's a work of fiction and the Author, in His Omnipotent Majesty declared it to work.
Here in reality ... I think he was on the right track, in the sense that those whose only stake in the community is what they can get from others with little or no effort on their part are unlikely to make wise decisions in selecting leadership. Note that the founders of this Great Republic limited the franchise to male landowners.
Absolutely, “ Service is Citizenship”. I’d modify that slightly to include the Conscious Objectors, put them in non-combat, support service roles. AmericaCorps doesn’t count.