those with political agendas after the war tend to be officers in the first place. some are better than others. JFK was a real honest to gawd hero in WWII (PT-109), while others flat-out lied about their war experience such as joseph mccarthy. patton even tried his hand at politics, i believe, and even non-war heroes such as eliot ness became (bad) politicians (though it could be argued neither had these ambitions beforehand, i suppose). the thing is it's a proven boon to have gotten high marks while in the military (or police) when going for votes. just recently, john kerry was tauted as a vietnam war hero (with much controversy involved) while clinton's draft-dodging was downplayed by the very same political group as 'military service should not be considered when voting for a president.'
basically it boils down to if heroes are made or are born for the most part. those with the notion to be a 'hero' for personal gain aren't heroes in my book. while it seems FA fancies the born part of heroism, i like my heroes typically to be everyday guys. potter works for the simple fact that it's fantasy-fulfillment, that every reader could possibly hold powers they don't know they have. for adult fare, particularly in SF i think, most of us guys growing older can associate better with the idea that we can be heroes, too, given the right situation. i think it's a lot harder to like mr. perfect with his little problems than it is for someone like myself who's given the chance to prove their worth, at least for me. that's why stories with people who have abilities that i could never possess aren't as interesting to me. (this isn't to say your story, FA, is bad or anything, just saying that i as a reader prefer stories with a different take. can't please everyone, eh? lol.)
my themes tend to grow from the plot and characters and to a certian extent the setting. every now and then i'll make some connection there and run with the idea, though i've found that when i do that it usually dillutes the story. i think once you have a 'theme' you start getting away from being entertaining by a few degrees and enter the realm of 'having something to say.' i also sometimes try to kill themes quick by wrapping the idea up inside a paragraph in no uncertain terms just so i'm not stuck for the rest of the story trying to 'say' something. it also gives me the freedom to later on reinforce it or ignore it instead of dragging it out.