Missed some mentions like crowdfunding, crowd-sourced journalism / investigative efforts & the like. But a good read.

Imho people (and even animals!) instinctively understand that most actions are not zero-sum. That other people's gain (whether individual or community) often exceeds the 'loss' of the person who puts in the effort. Doubly so if the latter enjoys doing it.

Classical economics ignores that. It assumes that parties nearly-always act rational (untrue), generally don't like 'work' so require compensation (YMMV), participants in a market are well-informed (untrue), transactions are zero-sum (rarely), money is THE only relevant 'currency' (it's just one of many), people are selfish (debatable, imho this is learned rather than intrinsic behaviour), markets are free (untrue), or that 'free' markets are the only way to efficiently allocate resources (again: debatable). That's a lot of questionable assumptions to base crucial socio-economic (and policing / military) systems on.

More likely it's mostly historic reasons. During some period, some approach worked better for some groups of people (probably helped by a lot of violence). And this carried forward to the present day in complex, poorly-understood ways. Never mind propaganda (include social networks' algorithms there), disinformation, or that status quo can be incredibly hard to disrupt.

Disclaimer: I'm not advocating to turn what exists upside down! But it's good to question underlying assumptions considered 'common knowledge'. Re-organise things, have a look at alternatives. And things change. What was valid yesteryear may not hold water today.