As for patriotic pandering, I call it respecting the sacrifice others are making and willing to give them this sort of perk at little cost to the rest of us. But thanks to their sacrifice, some of us are free to salute their service and some people are free to cynically dismiss any gestures of respect for them.
At the risk of getting off-topic, how many "perks" are enough? Why should they get preferential treatment boarding and disembarking planes? Don't they already get discounts on pretty much everything, not to mention multiple statutory holidays in their honour?
Also, they're not volunteers - they're paid. They didn't go overseas out of the goodness of their hearts. It's a job. A job with fantastic benefits (medical, pension, etc.)
But why limit it to soldiers? What about other people in virtuous professions? Maybe teachers and doctors should be allowed to board/unboard planes early, too? And police, firefighters, and paramedics?
How far do we take this? Do we extend it until the only people left waiting to board the planes are worthless janitors?
When everybody is a "hero," then nobody is a "hero."