It is a staggering statistic and I don’t think people who work in the public sector truly realise how different it is
I used to do consultancy work and would work with both private and public sector clients, the difference was like night and day. The big corporate giants were forensic in how they dealt with projects, everything was needed tomorrow, the standard of work required was intensely high, they battered you on price.
Switch to a public sector clients (NHS, council, government department) it was deliver it whenever you like, no bartering on costs, don’t really care about quality, constant delays, giant long meetings with so many people and 80% of them not saying a word.
It was just a fact that working with public sector was a piece of piss.