Perpetual growth in a finite system is impossible, and anything that relies on perpetual growth to function is doomed to eventually fail.

For instance: social services that rely on perpetual population growth (especially youth population; e.g. Japan/South Korea), companies that rely on perpetual increase in users (most publicly-owned companies; e g. basically every social media company ATM), industries that rely on perpetual advancements in technology (e.g. industrialized agriculture, which constantly needs new ways to fight self-induced problems like soil depletion and erosion), housing as wealth generation (to be a wealth generator it has to outpace inflation, but at a certain point no one will be able to afford to purchase houses at their inflated prices no matter how over-leveraged they get; e.g. Canada). [Note that these are merely examples where these issues are currently coming to a head; they are by no means special cases, they're just in a more advanced state of "finding out."]

In other words, a lot of the modern world, in both public and private sectors, is built around a series of ponzi schemes.