Although the fix only works if Jack takes the money before going all the way to the bottom left corner of the room, so technically, it could still result in a Jack Stuck, if the player snubs that easy money on the first visit.
I have done it several times and also in other places where I hop on brown bricks along the wall. I go up and up and eventually am stuck. I realized no one else seems to travel this way so thought I would mention it.