There is an item you can get from some side quest that gives you a permanent buff to Dispatch rewards (+50% more). Yet lots of people say it bugs out after awhile, and I think I found out why.
You can get the Golden Beer (the buff item) long before doing Chapter 9 (unless you just burn through the main story), and if you use it immediately, I imagine it will work as intended up until you get through a story boss in Ch9 and use the reward you get from it. The item you get from the boss is a +20 Spirit boost (perma), so most people will immediately use it.
I had the Beer in my inventory, since I didn't use due to ppl say it was bugged. When I beat this boss and got the Spirit item, I used it. When I did though, the Golden Beer icon went grey, and its use number went to zero, but it remained in my inventory.
So if you have the Beer unused, you'll probably NOT want to use the Spirit item when you get it. =/
But if you don't have the beer when you get the spirit item, I imagine you can use it, then go get the beer. Though maybe the Beer gets broken once you use a perma stat booster.