Restrict creation of discounts

[zcommons]

How do I turn off the ability to create discounts?  I've turned off the permission for Items/Point of Sale but they still have it for the dashboard.

Not a theft issue (that i know of) but I want to force them to use the discounts i create and the variable discount with their code.

Is there any reason why the system links these 2 permissions?  Or better, why they can't be separated?  

[alexandriak]

I didn't even realize you couldn't block the creation of discounts. I think this could be a great feature to add. @isabelle  can you pass this on to the right people?