I was reading posts from a couple of residents on a Facebook group I'm a part of who seemed to welcome it. Gettysburg/Adams county seems to have higher taxation than other towns in the immediate vicinity. I'm not familiar with how taxation is applied in the US but it certainly seems to vary a lot more than in Ireland. The higher tax rates if true were being blamed on the national park with is a Federal facility and funded from Federal tax dollars as far as I understand? One poster seemed glad that Walmart and more development would bring real jobs and real salaries, again another odd thing to me as I wouldn't have thought Walmart would have paid good wages or had good benefits?
Gettysburg gets circa a million visitors a year which brings some serious money into the local economy, is this a case of killing the goose that laid the golden egg? I know I would have never set foot in the place only for the Battlefield, I spent money in shops/bars/cafes and hotels as did everyone else. I'm sure there's towns nearby that would love a million visitors every year! If someone local could enlighten a confused foreigner again it would be appreciated.
Back on subject, I agree with the above that the whole town and surrounding areas is pretty much a battlefield, they put a McD's and a KFC and a hotel on the field of Pickett's charge so a Walmart on the edge of town is an already developed area doesn't seem that much of a leap. Having never set foot in a Walmart I understand the existing one is comparitively small, is there scope to develop the existing one? Is there a larger one nearby, I think you need a car to go to these mega shops anyway so it's not unreasonable to put it out of town? The Outlet mall is a little out of town but well within easy driving distance, maybe they could put it up near there? There does appear to be options close by.
It would be a shame to see Gettysburg become another shopping mall, I liked the quirky shops and 'Mom and Pop' feel to the place. My limited impression was that Gettysburg, the town, was doing pretty good. It had more going for it than your average small town in Pennsylvania mainly thanks to tourism and seemed like a pretty nice place to live.
PS if you think you're paying high taxes come over to Europe for a while

23% sales tax in Ireland! That's just for starters.