So in military RP money has no actual value to it. Of course you can use it for dueling and prestige when you hit level 40. However it is level 40, which takes a while to get. So i think there should be some type of system or dealer that you can go to and buy things off of. For example you can pay 1.5mil for perm MP5A5. Or when the new map comes out and its big enough make it so after level 20 you can buy cars for 400k, and keep the same soc leader system.
Another thing that really has no value except for little things is credits. An idea is to make a weekly pop up dealer who is there every Friday or Sunday and has certain items you can trade for. For example i save up 1000 credits and the Dealer comes around on a sunday for 24 hours, it offers me a Orsis for 1 week and then i trade those credits for that item for 1 week.
P.S. If you feel this idea is dumb, don't be toxic. Just give constructive criticism.
Inspiration from talking to @Gildarts