The Commisary and PX programs at military bases should be eliminated and replaced with commercial operations. Tax free sales hurt the states in which these bases are located and cause morale problems for those working on bases without military background (or friends who buy for them). There is no need for a Commissary or PX to compete with local businesses unfairly. There is no need to provide these highly discounted items to military personnel. Let them pay the price of all the normal people in the world.
Right now States are fighting Amazon with everything they have to get Sales Tax and people are doing anything they can to avoid taxation. It isn't fair to the taxpayer for the Government to notch out an entire section of consumers and deprive private industry with the ability to sell to these consumers.