Now we have the definition of a pay cut sorted what about the actual issues... If there is less need for ticket staff
But Boris Johnson isn't talking about "less" ticket staff. He has unilaterally decided to shut every single manned ticket office in the entire network, there will be "no" ticket staff.
This is despite the fact that he has absolutely no mandate to do so.
In fact Johnson previously felt that to win the London mayoral election it was important for him to pledge to Londoners that "there is always a manned ticket office in every station".
If Johnson thinks that closing every single manned ticket office in the network is a good idea then he should make it an election commitment for the next time he stands for election.
I mean he wouldn't want to be accused of being undemocratic, would he ?
EDIT : " fewer and fewer passengers are buying tickets and the majority now use Oyster."
IIRC one in five journeys are made by people who have bought tickets from manned ticket offices. Presumably stations through which a great deal of visitors go through the figure is considerably higher.