But these PFIs, which were sold as a Good Idea at the time, are now costing the NHS, schools etc very dearly.
Hospitals and schools were not always built by PFIs (and even PFIs put money back into the economy even if they bled inexperienced public sector managers dry). And there is vastly more expenditure in the public sector than just constructing the buildings. There are no State owned manufacturers of anything so every last item in a school, hospital, prison, police station, town hall etc. etc. is supplied by a private business of some sort.