They are paying higher rate tax on those salaries, if correct and are net contributors.... or don't you want that?
Seems like you want us all to be on a pittance, claiming UC top ups.
Anyway, 70k in Central London, isn't much, work all hours too, plus have suicides to deal with, many of the people they are driving around will be on many times that amount.
Station staff, also on strike, are on 40k.
If more people were in unions, we wouldn't have such high in-work benefits, the average EU8 worker is around 10k p.a better off than the UK worker, much of which is down to unions.