I disagree, others on this thread have already addressed the reasons why.
FWIW, no business has to offer military discounts of any kind, and as evidenced by many of the posts above, I think Disney is actually quite generous when it comes to that.
In fact, while it's niether here nor there when it comes to WDW and the DDP, here's an example of deals offered to military personnel by Disney (that I would LOVE to get in on)
Disney Northern European Capitols Cruise
2 adults, same date, same stateroom category
Non Military price: $7,470
Military price: $2,548
Nope, can't get too upset that folks staying at SOG don't get the DDP