Earlier quoted context omitted.
Why are prices controlled at all? Because as a consumer you can go somewhere else. If there is insufficient excess supply capacity we can't do that in aggregate and prices can be hiked with impunity. Inflation is always, everywhere, a lack of effective competition.
For almost all goods, price increases will decrease the amount purchased. If there's still insufficient excess supply capacity after substantial price increase and decreases in people's purchasing power and consumption, then the reason competition isn't lowering prices is because that's the actual market-clearing price where demand is equal to the amount that can be produced. This can't be fixed by forcing companies…
That's the problem.
Somebody has to stand the loss, and for that to happen there has to be an expectation that you can't pass on the price shift somewhere in the cycle, which then forces that somebody to reduce the quantity purchased or shift it to an alternative supplier.