It doesn't make sense for the Army to be in the business of developing software. They should be outsourcing this, and having a well-known vendor like SAP means there's a lot of different avenues to get bids to lower prices.
Why not? They need digital soldiers. They farm spec-ops from the best grunts, so this would give them a pool to recruit their information warefare people from.
The Army isn't a business and should never be run as one.