We have roles to help the leaders (VL), boost attacks (Fleet Admiral), save morale(inactive) and etc etc.
The Treasury role should be the person in control of the family bank(skyline idea).
The role should also give the person holdin it a income increase, so it wont be ideal for everyone member.
*Also, only seen by family members.

Treasury abilities:
Income increase (Mods determine the %)
Family bank main controller (Decided by the leader)&(SKYLINE idea)

Outcome:
Easier for the family to know who the fam bank is.

More suggestions is welcome. what u think?