This is going to go the same way as privatisation of the railways.
The 'good' bits make profit for private capital, the 'bad' bits (i.e. the actual infrastructure and its associated fixed costs) remain as public entities that drain the public purse.
Electricity, telecomms etc were privatised in the late 80's - but these were largely ripe for it as they have a far smaller % of their cost base as fixed infrastructure. This is why, very broadly, there can be some claim that they have 'worked'.
The railways, on the other hand, have been a complete disaster as the upkeep of the actual infrastructure is so costly and onerous no one wants to really tough it with a barge pole.
Some things should not be privatised solely out of dogma. I think RM is one of them.