You disagreed with the statement "One man being rich doesn’t make another man poor."

I was explaining why that statement is actually often correct. When I buy a phone, wealth inequality gets worse but yet it is still a positive sum trade.

The system doesn't thrive on wealth inequality. Wealth inequality is a mere byproduct of forces like the tremendous scale afforded by capital markets and technology, the unequal distribution of the extreme end of intelligence, the increasing relevance of intelligence in the context of modern technology, the rise of China as a competitor for our lower classes, and so on.