>>>I don't even understand why people are so greedy.
>>
>>It's not people, it's the nature of capital.
>
>How so. Capital is a thing; it has no nature. Only interaction with people gives it direction and/or purpose.

Capital (as opposed to labor) is by nature expansionary and acquisitive - aka greedy.
Yes, there are some capitalists who are more or less benevolent than others, but at the end of the day, ROI is the basic credo of capitalism.
Wall Street analysts don't talk about earnings.
They talk about earnings growth.
It's a mathematical necessity. Because of compounding, a consistent ROI requires the perpetual expansion of earnings by one means or another.
Gordon Gekko said it best: "Greed is good!"