Honestly, monetary rewards for doing the right thing may be the way to go here. I agree that it would be difficult to fire everyone and have no one to even open the doors in the morning, so this situation may involve a "few-step" program.
I cringe at the thought of paying people a bonus for doing their job correctly. In my opinion, I am paying them a
salary to do their job...I shouldn't have to pay extra when they do their job at 100%. A bonus should kick in when the employee goes above and beyond.
That said, I have used a reward program to better the performance of Tellers/PBs...but it was a no-errors = small payout (certainly not $10/account - I'd be paying hundreds of dollars to employees each week!) But another thing to factor in is tellers/PBs are typically low paid and $10 is a big deal...if your problem is with lenders, a $10 bonus will not convince them to change their ways.