Is there any reason why the staff don't work as usual while striking
but just refuse to take money for tickets? Only single/return tickets
for that day/journey. That way the passengers don't get
inconvenienced. Is the problem that the staff would be treated as if
they've stolen the money? Or would the tube bosses actually prefer
this course of action - or maybe they save money during a strike from
less electricity usage? I'd imagine a lot of the costs are fixed
though.