when this does not come about it is because the workers are paid too much.
For what they actually do, yes! That's why the unions are afraid of new technology. It is a thousand times more efficient. A postman on a 48 box fitting has to be able to sort 500 letters in 15 minutes to get the job. Once there I suppose this figure drops to an average of 200-300 (if that) I would guess. They then have to be secodary sorted on the divisions (counties) at around the same speed.
Have you any idea how many letters an automatic OCR machine can handle an hour? It's tens of thousands for each machine.
These strike threats always seem to happen just as Christmas approaches. The bonus they get paid is unbelievable, and the overtime is endless if they want it at that time of year. They earn an above average wage all year round though.