While I very much agree with the main point, I want to present another possible steelman of the concept of "greedflation", which is that in many parts of the economy are no longer following the rules of capitalism but rather some other system (maybe Chokepoint Capitalism as coined by Rebecca Giblin and Cory Doctorow, or Technofeudalism as coined by Yanis Varoufakis) where a few corporations have managed to get into a position where they are essentially exempt from market forces and can set prices more or less arbitrarily. If a competitor does pop up, they have various methods to shut it down such as lawsuits, predatory pricing, or simply buying up the competitor. But of course, in such a situation any excuse to raise prices would be a good one, so that it happens to be inflation is just coincidental.
While I very much agree with the main point, I want to present another possible steelman of the concept of "greedflation", which is that in many parts of the economy are no longer following the rules of capitalism but rather some other system (maybe Chokepoint Capitalism as coined by Rebecca Giblin and Cory Doctorow, or Technofeudalism as coined by Yanis Varoufakis) where a few corporations have managed to get into a position where they are essentially exempt from market forces and can set prices more or less arbitrarily. If a competitor does pop up, they have various methods to shut it down such as lawsuits, predatory pricing, or simply buying up the competitor. But of course, in such a situation any excuse to raise prices would be a good one, so that it happens to be inflation is just coincidental.