I don't think it would be trivial to increase demand by 10x (or even 2x) that quickly. Eventually, a publicly traded company will get a bad quarter, at which point it's much easier to just reduce the number of employees. In both scenarios, there's no need for any new-hire.
I think there’s always demand for more software and more features. Have you ever seen a team without a huge backlog? The demand is effectively infinite.