Just noticed that in the journal when I went to the “show gang savings” page it had both payouts I mentioned earlier, a small table has appeared with columns - on the left it has the initials of who was on the mission and the amount $300 and next row same re initials and $150. The column on the right then has the total at $450.
So so it seems the money is there, but it is under gang savings and not in the camp ledger, so maybe it can be used somewhere else during the story, I’m not sure.