Earlier quoted context omitted.
You might find https://en.wikipedia.org/wiki/Margarine#Coal_butter fascinating. > Strictly speaking, farming is where all our livelihoods come from, in the greatest part. We're all living off the surplus value of food production. I don't think farming is special here, because food isn't special. You could make exactly the same argument for water (or even air) instead of food, and all of a sudden all our livelihoods w…
Except in a few places drinkable water is in such abundance that nobody every spent significant effort trying to get it. Likewise for air, few people have ever spent much effort getting air to breathe - even in the worst polluted areas bottled air was reserved for airplanes, hospitals (and a few people with medical conditions), and scuba divers.
You could argue that water being so cheap is exactly what you'd expect when the surplus value of water production is sky-high: people only spend a fraction of their income on both food and water production, exactly because the surplus is so high.
Thus if water isn't the basis for all our livelihoods, neither is food production these days.