Everyone in public services knows why productivity is low: you’re asked to do more with less.
I’ve got a personal training budget in the private sector larger than any departmental budget I managed as a HoD in schools. I complain cos my MacBook is three years old, as a teacher I begged for old PCs for the classroom. All public services are dealing with social and mental health issues which are expensive and time consuming and not strictly their remit.
Also looking at this for ~40% of public sector GDP output is fixed as input and is constant so the whole public sector productivity thing seems like a paper thin scam to justify suppressing wages.
Sources and methods information for the Public service productivity: total, UK publication, detailing the main concepts, output and inputs measures by service area.
www.ons.gov.uk