Heinlein in notes and interviews said that only about two percent obtained the franchise through military service, but you had to perform some form of public service. One example given in the novel was that if you were (his words) deaf, dumb and blind - they would give you a job counting caterpillars by touch. Society would find some kind of activity for you, so you could obtain the vote. But yes you had to do something to get it.How else would you describe a bipartite society with political right of franchise and to hold office resting exclusively in the hands of military and former veterans.
Asimov seems to be leading the poll, I always felt that Heinlein and Clarke were much better at creating characters then Asimov. For me Heinlein barely edges out Clarke for first place, Asimov a distant trailing third.
