I'm not against government regulation of essential infrastructures, but we should be aware of the fact that it's very difficult to get right, particularly (but not only) in a political climate where government spending is such a divisive issue.
I think that any capital intensive infrastructure becomes more difficult to manage effectively as it ages. Even relatively rich and well maintained infrastructure like the US Interstate system has severe design flaws (35-year lifespan bridges that are 40 years old) that make life more complicated.
Is that a regulatory problem? I don't think so.
Government has served a variety of masters in the past - but rarely purely the public interest.
This is absolutely false. Policy debates universally assume that it will serve the public interest, despite experience and extensive research in public choice economics.
The result is that we get policies that aren't crafted to be robust to corruption and bad incentives, and that gets us to the state we're in today.
Any policy debate should include discussion of what could go wrong, what the effects of that would be, and what we could/should do to prevent that.
I would add to that that the free market definitely does not exist to serve the public interest, as far too many fans of it tend to forget.
Capitalism is the extraordinary belief that the nastiest of men, for the nastiest of reasons, will somehow work for the benefit of us all. -- John Maynard Keynes
There are places where the free market is ideal - utilities, such as Internet service (which requires either right of way on private land or permission to transmit and receive without interference on public airwaves) is not one of them.
As far as outside utilities, and similar services... I feel the government's role should be to limit monopolies, not eliminate, but only so much as to allow for competition to happen. The rediculous extent of IP protectionism, specifically patents on design, algorithms and business processes are counter to that. Corporate personhood as a legal concept is against that. For that matter, corporations should probably instead have limits on unutilized/underutilized assets for a given length of time, and enforce distribution back to investors in those cases.
A free market is a market is one where upstart competition can generally succeed, and entrenched incumbents are regularly surpassed, or continually growing.
At the end of the day the government exists to serve the public interest.