[jcbrand]

The second paragraph on Wikipedia:

Central banks in most developed nations are institutionally independent from political interference.

https://en.wikipedia.org/wiki/Central_bank

[qsort]

The paper linked in the Wikipedia citation for that line has the following in its abstract:

"The governance of central banks has two dimensions: corporate governance and public governance. Public governance is an institutional framework whereby the general public governs a central bank by and through the legislative and executive bodies in a country (...)".

"Independence of the central bank" means independence from direct intrusion by the executive branch, in the same sense the judiciary is independent from political interference.

[jameshart]

So, generally, are courts, police and civil servants.

That doesn’t mean that those are not government institutions.

[Seriomino]

You used 'privately owned' to indicate it being shady.