[nerdsniper]

Optimally, suppliers/vendors/customers would like to grow together. If the companies I'm the vendor for are only getting a tiny sliver of value from what I'm selling them then they might not grow in their market, and my business with them also won't grow.

There's a lot of narrow-sightedness in this zero-sum model of transactions.

[ty6853]

I just described a possibility where the businessman is better off and the customer is one iota better off, that is not 'zero-sum'.