"organisation change journey"
What a nice term to describe a job killing spree.
Will it cost less? Yes, probably at first. But it the coming years it will be much more expensive, because of the loss of reactivity, the demise of internal knowledge and the fury of disgruntled users having to deal with underpaid and under-tech-cultivated outsourced support.
It a short-sighted view, to please bean counters and shareholders.In a few years, it means a loss of efficiency that will impact productivity. That's not a problem for the C-suite, they will be gone elsewhere for a long time with the huge bonuses they'll get thanks to the massacre they orchestrated.