before you can change voters, one has to change the government. in that movie the government is predominantly feaderal.
Limiting the specrum of voters will effectively destabilize the democracy. its the debates and parties of modern ploitics that lets this country run as it does. with voting power under those who have served in the military, the opinions and views of the voters will be heavy to one side. this means that there is little chance for change, which in turn poses a threat to democracy itself.
example. Take Nazi Germany. It was completely effective for quite some time. After the fall of the Weimar Republic, the economy grew, and the Germans escaped communism when Hitler won the seat of chancellor after Schleicher was assassinated. (things are goin good for Germany)
Then the enabling act was passed which abolished the German gov't and replaced it with Hitlers Dictatorship (its here on that things go to hell).
But the unity of germans lead to their unstopable nationalism. The mostly one-sided view of the germans did not allow for change, and ultimately the dictatorship fell. BASICALLY, a unity of politics will work for a time, but ultimatey, its the diversity of this nation that keeps it afloat. (on account of the US democracy has survived longer than any established government in history)
so no.. it probably wont work haha