Why do innovations in plumbing and sanitation generate consistent revenue regardless of economic fluctuations?

Answer

They address non-negotiable human needs

Because plumbing and sanitation provide essential, non-negotiable services that societies require to function, they remain economically stable and resistant to market cycles. Their value is rooted in the necessity of the service provided, ensuring they continue to generate revenue as long as the population requires these basic, foundational living standards. They provide value that is indispensable, which is less vulnerable to economic dips than luxury or non-essential goods.

Why do innovations in plumbing and sanitation generate consistent revenue regardless of economic fluctuations?
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