WalMart seems to be often cited as the biggest competitor in this market, but I don't find it very compelling as an alternative. I know many people who do not s

WalMart seems to be often cited as the biggest competitor in this market, but I don't find it very compelling as an alternative. I know many people who do not shop at WalMart for numerous reasons, e.g. their labor practices[1]. The fact that giant, monopolistic corporations like Luxottica and WalMart seem to be the most viable option for something essential to many people is not particularly comforting. [1]http://www.forbes.com/sites/rickungar/2013/11/18/walmart-store-holding-thanksgiving-charity-food-drive-for-its-own-employees/ http://www.forbes.com/sites/rickungar/2013/11/18/walmart-sto...