Devil will be in the detail.
There is some logic in short incremental scales in my opinion.
Come in at the bottom, get trained, get ticks in box, get better, get a rise.
In my old mob, the Met Office of MoD there was not a lot you could do with a new assistant, certainly not send to an airfield as a solo unsupervised observer. But observing was the basic grade, so, as I said, a short scale made [and makes] sense. This predated performance pay, which was not necessary, in that, if the chain thought you could cut the mustard they sent you observing and if not they could say goodbye as long as the decision was early.
Again, on promotion there are jobs that cannot be done in the first year, or they would not be worth doing.
What is nonsense is a long scale ....... unless a worker is promoted after say five years they are both fully trained and not going anywhere.
It will be interesting to see where on an existing scale say 1,2,3,4,5 they peg the new pay amount. They cannot get away with 1. and nobody believes they will offer 5 !