The problem is that competition is not working for every business. In a case like electricity distribution that necessitates large investissements, no matter what (you can't really have "small" businesses here) you will end up with quasi monopolies and no meaningful competition. That's why it makes sense here to use a public ownership or something near that (for security purpose and control).
Privatizing everything is not the miracle pill you seem to think, some domains just don't work with it even though in a number cases, private ownership is more efficient (since usually, competition works like a "natural" regulator where efficiency is concerned). Privatizing everything can lead to out of control corporations whereas state ownership for everything would increase bureaucracy too much. You really need to think about which system works better for each sector and not dogmatically use one or the other.
It was a bit off topic but I thought it needed to be said.
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