As the FT notes the real explanation is falling incomes.
OK, UK incomes are down from 2007/8.
More than that though, it has imposed specific costs. Nurses, teachers, the police, and so many other key workers people depend upon and value have said that austerity and their consequent penal pay awards has gone far enough and they can take no more. And people agree with them: these key workers are very obviously only saying what is reasonable and justifiable.
Hmm, I wonder. If all of our incomes have fallen then shouldn’t theirs too?