The military serves the tax payer by preserving their sovereignty.
It's nice that they allow civilian use of GPS, but it doesn't follow that they need to. It's perfectly acceptable to say that a civilian organization, government or otherwise, is responsible for providing satellite-based location services for civilian use.
The way GPS is operated is very unusual. The military doesn't provide satphone service to people around the world; are you arguing that they should?
It's nice that they allow civilian use of GPS, but it doesn't follow that they need to. It's perfectly acceptable to say that a civilian organization, government or otherwise, is responsible for providing satellite-based location services for civilian use.
The way GPS is operated is very unusual. The military doesn't provide satphone service to people around the world; are you arguing that they should?