There is a difference between 'better utilise staff' and 'displace staff as the first step of a clear, published plan to get rid of them to save money'.
You do understand that, but are intentionally choosing not to acknowledge it, I presume?
Several DOO TOCs have a policy of natural wastage, that much is true. I am ambivalent about that, though I support better-staffed stations with visible staff walking the floor (and not behind glass wherever possible!). However I note there won't be any compulsory redundancies on Merseyrail.