alt Hacker News"Extract" here has two meanings:
1. Extracting from the market or the economy. It seems like (correct me if I'm wrong) this is what you're reading it as? Here you're generally exploiting what private equity calls "pricing power" or what economists call "enclosures" (or "rent-seeking") so inelastic demand (eg housing) or market protection (eg making municipal broadband illegal); and
2. Extracting from labor. This is the basis of the labor theory of value [1].
The point of comments like AOC's is mostly the second one, which is to say that you only become a billionaire by extracting it from your workers. And yes, this is a fundamental disagreement with many people. Some will say that the startup founder who makes a billion dollars deserves it by taking the risk or being the leader or however you want to frame it.
The counterargument is that that value simply wouldn't exist if it wasn't for those workers and their work. Even Instagram, which famously had only 13 employees when acquired for $1 billion, still needed those workers. It would've been nothing without them.
Take Google as another example. The profit per employee has famously been (at times) over $1 million per year.
The term for this is "surplus labor value".
As the Wikipedia article states, the labour theory of value (LTV) was replaced by the theory of marginal utility in mainstream economics due to its major inconsistencies.
> Take Google as another example. The profit per employee has famously been (at times) over $1 million per year.
So, are you saying that the employees were exploited in some way? I could give you examples of how value is created without any work at all.