memes

How about this: "a functioning market economy" is only possibly with strong overshight of a greater authority than "the Market", which puts the interests of citizens above the interests of businesses.

If left to their own devices the Free Market only ever exists in low barriers to entry and low economies of scale markets, like teddy bears or soap, not in markets were it's much harder for new entrants and being bigger is always better - and energy generation until recently was very capital intensive and required big power plants or dams located in very specific places so was not a flat-playing-field size-agnostic market and tended towards monopolies and cartels.

Even nowadays with solar, even in those countries were personal generation is viable unless governments have intervened and force it to be otherwise there are barriers for individuals and small companies to sell their self-generated power (for example were I live they get 1/4 of the price selling than they do buying), which are a mix of cost barriers to entry (the cost of a proper converter on top of the cost of the additional panels if you want to go beyond self-consumption), financial structures dominated by and best suited for large companies (mainly the wholesale and consumer markets being separate, with the large companies sitting in the middle and extracting rents from being an intermediary) and even regulatory barriers to entry (the product of governments activelly legislating and regulating to benefit the large energy companies).