It is the other way around, When people want something they are willing to pay more for it. The manufacturer wants to sell to the person that will pay the most. While the person wants to buy from the manufacturer that charges the least. As such when the manufacturing capacity is below demand the price goes up until the item is worth what people will pay for it(at large, statistically, it works like an auction). The promise of capitalism is that as the price goes up it should incentivize manufacturing capacity to go up and as the capacity meets demand and the manufactures start to fight each other to be the one to sell the item the price goes down.
Sometimes this works and sometimes it does not.
Thank you for taking the time and effort to provide a clear explanation. I’m familiar with supply and demand though. My emphasis was on “must” as a lazy protest against greed being considered a mandatory part of capitalism. Prices don’t have to go up, someone just wants more money.
If you happily sell apples for $1 and see a hungry person walking towards you, must you raise the price?
I think that basic thought gets lost sometimes when people talk about shortages causing the price to increase. The shortage didn’t cause anything, some executive decided they want more money. That’s all. There’s nothing inherent in the system that requires it. Whether that’s OK or not is up to the reader, I just think people lose sight of the reality and talk about it like it’s gravity, rather than simple decision making.