Hide prices (amount field) to staff
Actually any admin can see the price for any service or product a customer has.
If you do not allow this, then field used for selecting a service/product when opening a ticket won't be viewable for this staff user.
When granting privileges to a staff user, you directly allow him/her to see all prices for all customer services/products/addons.
1) It should be easy to add an option to hide this field.
2) It should be easy to add an option to show the selected field (service/product) to any staff member despite privileges, in addition to first option.