[bawolff]

Yes, although i would argue that a cartel suppressing supply is a different mechanism than what is happening with scalpers.

The onion futures thing is kind of interesting, because it was essentially the opposite of a scalper - they didn't try and buy all the onions to make price go up, they did it to crash the price of onions so that their short positions would pay off. Still a fair counter example to the idea that the market would self correct by itself.

People not trying to monopolize the food industry is a bit of an american centric view, e.g. Canada had a government mandated wheat monopsony for a long time. I think australia had something similar. I'm sure there are plenty of historical food monopolies. They of course couldn't be too greedy or its off with their head.