There's a very good argument for it. I cannot think of one - not one - government organisation that performs better than private sector rivals on the same industry. The telecommunication industry has been revolutionised in the private sector. The uk nationalised automotive industry was a national enbarrasment.
You only have to look at your own profession. Only 7% of people are privately educated and yet the vast majority of them outperform the sad souls condemned to the failed state system.
NHS. Police. Education. To name 3.
Your terrible knowledge of how stats works is showing in that last sentence. Give me a state school where the parents pay to attend and I can kick out anyone (plus large scale cheating is well known to happen - talk to pretty much any ex-private student) and I'll kick the shit out of those results. Private companies cherry pick and don't have to provide a universal service in most cases so it's apples and oranges.
Also, the latest stats show that state school students with worse grades do better at uni and drop out less than private school students, so even with the advantages it's not that clear.
I could mention G4S, Capita, etc. etc. in private security. The NHS gives the best value for money and efficiency in the world. 94% of the NHS budget is spent on healthcare (6% admin) compare that to 36% spent on admin in the US private system.
Telecoms wasn't revolutionised by privatisation, it was revolutionised by the mobile industry and the Internet. Our speeds under private ownership are piss poor compared to some of the better state run networks. Oh and the reason for that was competition made all our mobile companies bankrupt themselves buying 3G space, then they couldn't afford the infrastructure.
The UK automobile industry was on it's way out, as with a lot of UK manufacturing to be fair, due to outdated management practices (still about today from what I see at a lot of large UK companies).
And that's before we get onto the Army, or, you know, running the fucking country which as much as anti-government types like yourself bleat about, is actually done pretty fucking well compared to some places. The size of the admin required is huge. No private company without the ability to pick and choose their markets could come close.
You've fallen for the propaganda peddled in this country since the 80s. Hook, line and sinker.