I am reminded of the 1984/1985 miners strike.
It originally started with the intention of preventing pit closure and saving miner's jobs, but the long term effect of the strike was exactly the opposite.
The longer these strikes go on, the more people will learn to manage without the railways, and once this happens it will be difficult to persuade them to return to using train services when the strikes are finally over.
If the unions are waiting for the election of a Labour government, this could still be over a year away, and the damage that is done to the finances of Network Rail and the TOCs will make it more difficult to afford pay rises in the future.
Similarly for the NHS and all other sectors where strike action is taking place.