https://www.ft.com/content/1057f722-75d5-11e1-9dce-00144feab...
A lot of NHS privatisation was done by Blair and Brown - especially to facilitate Brown's use of off-balance sheet debt to fund spending while pretending the government was not increasing national debt.
A lot of privatisations were a good idea. I think most people would agree the government should not own oil companies, airlines, car manufacturers, steel manufacturers, or telecoms, etc. I think the mistakes need to be seen against the backdrop of a necessary correction of a lot of nationalisation.
The problem has also been regulatory. Why were water companies not required to build capacity? Why were they allowed to borrow in order to pay shareholders? This was all entirely foreseeable.
I think the problem is not an ideology, but the lack of a coherent ideology. Privatisation has become an end in itself, backed by politicians who do not seem to understand that its not a magic bullets, and there is no incentive for efficiency in the absence of competition. A private monopoly is usually worse than a state monopoly unless very closely regulated.