You can see all past transactions in some detail already, although being able to see each item of staff outgoings linked to the staff member that is being paid, and a little more information on each line item would be nice.
I don't see how future would work? Bonus can not be predicted, nor can purchases of cash or daily rewards. so it would just be your base sponsor income less your expenses. Your future forecast would always be understated.
Also depending on expiring contracts, your outgoings could drop off sharply. How is the game supposed to know your future management decisions on contract extensions, or let it expire and sign someone new. Or driver/staff sales and purchases.
It's something you can model yourself in a spreadsheet far more effectively than a bespoke game interface ever could for you in my opinion.
Community Manager