Agree regarding water and power, and really anything environmental.
As far as the market goes, I think part of the problem is that most industries are not true free markets, AKA: high competition, low barriers to entry.
Industries that are close to true free markets: restaurants, barbers, spas, handcrafted goods, almost any manner of small business.
These are some of the most ancient industries and have never collapsed or become overrun by corporations.
The issue with something like deregulating banks is that banking is not a true free market. There is no high competition (it's concentrated by a few corporations). So deregulating it can be disastrous because it's basically allowing a corporate monopoly to run wild.
If they deregulated it AND made a massive concerted effort to bring a ton of new, smaller, independent banks to the market, perhaps it could become a self-sustaining free market that truly benefits the people, with little need for government intervention.