Hm. I can't think of any significant examples here of a company owned or run by the government. I know that such things are more common elsewhere, but at least in my mind I tend to classify them as extensions of their respective governments rather than as anything like private corporations. I suppose the real question in this context is whether that government would let them be disrupted and replaced with a competitor they perhaps have less influence over.
> And also elections.
Sure, in theory. I suppose if an election actually changed things enough to be considered "disruptive" then you could consider that a form of revolution, but disruption of that sort generally has exactly the opposite effect: Everything becomes much less efficient as the new party struggles to take control, and then gradually returns to baseline as they realize that it's the masses of unelected bureaucrats that really run things on a day-to-day basis. Even if they were explicitly running on a platform of improving the efficiency of public services, it's not as if there is any actual competition in the provision of those services. People aren't choosing between two or more proven service providers; at best they have the current entrenched system with its known issues and a bunch of vague promises regarding a half-cooked proposal for a replacement which the candidate may never see implemented and which probably wouldn't work as advertised even if it were.
> Governments do not get disrupted short of foreign invasion or revolution
And also elections. This is especially true in countries that don't have a two-party system.