I believe and always have, that the Govt will not offer any more than around 1/2 the current inflation figure to any public sector worker... ever and should inflation fall, they can shout "look we are giving inflation matching pay rises"
The mandates for strike action run out in the next few months, strikers cannot afford the loss of pay, unions can't keep offering strike support payments and once this law is passed, then strikes become less effective... less support from workers and public for strikes, so new strike ballots fail...
Any failings in education health etc can be blamed on the strike action.
If or when Labour win, they won't reverse the law either, regardless of what they say now, just like Labour never reversed any of Thatchers anti union laws.