The PSNI will become unrecognisable from the force envisaged in the Patten Report without sustainable funding, MPs have been told.
Pamela McCreedy, the PSNI chief operating officer, also said the force is set to shrink below 6,000 officers for the first time by March 2025.
In remarks to the Northern Ireland Affairs Committee, Ms McCreedy said the funding crisis facing policing in Northern Ireland is a marked contrast to the "uplift programme" for police forces in England and Wales.