I have been trying to figure out how to combat this bullshit argument succinctly. So far I am at this:
If you vote for a person, it tips the ratio of votes they recieve (which is the only important thing in our system) in their favor. If you vote third party, not only does the ratio of votes between the two forerunners not change, but you completely throw away your representation.
The way the system is set up right now means that only half of the voting population is even represented by the elected person.
Check out mindustry! Although it doesn't quite have that tactical itch as Arma, it is 100% based around logistics and building up unit production. There is a multiplayer PvP mode, as well as 2 PvE campaigns