> but often privatisation is required too.
Based on what exactly? That privatisation is required is something you hear quite often, but rarely a solid explanation. Often times, the organization or service operating at a loss is cited. But this is barely a good KPI to look at when it comes to public services. Even if a public service operates at a loss on a business level, it can still mean the very same service is „profitable“ in a macro economic scope.
> Publicly run services and utilities often suffer from inefficiencies because there's no incentive to change the processes and lots of government funded agencies suffer from the "we must spend our entire budget or we'll get less next year" syndrome.
This is not inherent to government services, it is a leadership issue. One - as I may add - is frequently encountered in many large entirely private organizations as well. As such, it barely serves as a good argument in favor of privatisation. Private companies are not incentivized to be efficient, they are incentivized to make money. Money can be made by being efficient. But the ultimate way to be „efficient“ and make loads of money is by being a monopoly - something that you‘re often supporting by making formerly public services private.
Beyond that, what counts as inefficient? A public service can and should have different bars as a private org. For a private company, anything where the process cost is higher than the expected return is inefficient.
Take a postal service as an example. Running a postal office in a small town with few people and little postal traffic is almost certainly inefficient. But is this a good enough reason to cut people off such a critical service?
> Privatisation replaces the leadership with people who are incentivised to make the organisation as efficient as possible
That is what the theory states. In the real world, efficiency gains almost always come down to cost cutting in terms of reducing the service quality, reducing the service availability or a combination of each. In my opinion, to talk about efficiency gains, you need to provide the same service for less - this is rarely happening.
> Probably the sensible middle ground is for the government to maintain a sizeable but minority share in everything that gets privatised, with a general policy of never exercising the voting rights unless it's against a course of action that is clearly detrimental to public interest
This just seems like an elaborate way to privatize without actually privatizing. Again, I am generally strongly against privatization, particularly when it comes to natural monopolies such as infrastructure.