Planet Money has done an excellent episode on this - https://www.npr.org/sections/money/2013/06/25/195641030/epis.... While I broadly agree with this, I would say that scalpers can actually provide a service of exchanging money for time and convenience. For example, you may have a free or cheap concert that sells out extremely quickly, but with scalpers, those with lots of money can always get a ticket. Much of the economy is built on the similar concept of arbitrage, where someone buys something cheaply and sells it for a markup to those who lack the ability or knowledge to get it from the seller's source.
That said, scalpers in particular seem to cause a whole lot more harm than good in general. As the above podcast addresses, it's a very difficult problem to solve systemically if you are intentionally undervaluing your goods.
Less descriptive, but I would think "Let's forage for food at low tide" would convey much the same meaning more succinctly. Still cool, thanks for sharing!
That said, scalpers in particular seem to cause a whole lot more harm than good in general. As the above podcast addresses, it's a very difficult problem to solve systemically if you are intentionally undervaluing your goods.