I would write to your executive committee asking the why receipts don’t appear as soon as they are received into an account of the OC (from which it could derive interest, or transfer any surplus to a higher interest-bearing account). If you are on the EC, just ask the managing agent to explain. Remember the managing agent works for you, not the other way around. If the EC is being too timid, they need to politely but firmly instruct the managing agent to deposit all money received on behalf of the OK into the OC’s bank account.