According to both the Core rules and Stay on Target Rebel characters could be paid wages for their service. I've been planning to give them to my group so that they can bribe officials, procure resources and equip themselves with non-standard issue gear among other things.
The problem is neither source gives a guideline as to how much is appropriate. I'm not sure how to balance economy in this latest edition but I've eyeballed it and given players 500 credits per month.
Is this a suitable amount? I assume there should be some varience for both rank and risk as well. The base they operate out has been fairly successful and the CO has been focused on morale so pay has been fairly regular so far but as things get more desperate they will be short changed.