We could still retrain people for this, but yes, it's not trivial. The problem for union negotiation is that it would be considered a demotion / harder job. T

We could still retrain people for this, but yes, it's not trivial. The problem for union negotiation is that it would be considered a demotion / harder job. This is why the best thing to do is just run more service while automating lines. And eventually build more network too.