BA used to run a scheme for staff whereby if you suggested some thing to save money they would investigate and if plausible you would get a share of savings.
I had noticed that out of London they were bulk loading bread rolls and placing a bread roll on the tray. I suggested they remove the one on the tray.
I received quite a good cash payment and the choice of a sizeable gift from a catalogue for my idea.
They worked out the cost of the bread plus the cost of placing it on the tray as each item had a 'cost' to perform this.
So I'm sure the olive story is true.