Some years ago we bought some hastas from a neighborhood nursery. The woman owner picked up a dozen heavy plants and put thme on a cart then dragged them over to my car. Chatting on the way she told us she worked for the USPS, but she was currently on disability.
I presently play ice-hockey with a State Sheriff / Highway Patrol who is on disability. Hurt his lower back a year or two ago while on duty.
Did you report her to your Postmaster?