They are not if there aren't customers who are willing to pay more. For instance imagine a widget that lasts 1 year and is just under 1/2 the price of one that lasts 2 years. There may be high demand because it's the more economical option. If you raise the price so that it's 1/2 the price of the 2 year widget then demand collapses without effecting supply.
If customers were willing to pay more then a higher price wouldn't solve anything. The price is said to be too low exactly because people are trying to buy more than there is available to sell. The whole point of higher prices is to try and scare people away. Not enough supply and a price too low are the same thing.
They are not if there aren't customers who are willing to pay more. For instance imagine a widget that lasts 1 year and is just under 1/2 the price of one that lasts 2 years. There may be high demand because it's the more economical option. If you raise the price so that it's 1/2 the price of the 2 year widget then demand collapses without effecting supply.
If customers were willing to pay more then a higher price wouldn't solve anything. The price is said to be too low exactly because people are trying to buy more than there is available to sell. The whole point of higher prices is to try and scare people away. Not enough supply and a price too low are the same thing.