Pretty sure greed existed long before capitalism was a twinkle in any economist's eye. The East India Company was rapacious and evil and full of greed. But it was mercantilist. https://en.wikipedia.org/wiki/Mercantilism
Not necessarily. If the entire industry triples its prices and alienates 40% the market, it's still coming out ahead. It only incentivizes producing more if there are enough people unwilling to pay for the new prices, or if it were easy for a newcomer to come in (it's not)