I've heard some tales about a town in Michigan - let's call it Flint - where water was distributed using some older provider, while some newer company existed which charged less. A newly hired CFO decided, logically, to save some funds by going to the cheaper one. CFO didn't know that pipes in the town were made in the old fashion (lead metal?) and the new company, which used iron pipes, used some chemicals in water which helped to keep pipes clean. This chemical wasn't used by the old water supplier. When flown through old pipes, the chemical caused dissolving the lead into water. By the time the population of Flint switched to bottled water for everything the CFO was long gone with earned bonus for saving money to town.
I wonder what such stories, if true, teach us for the future. Just general mistrust towards financiers doesn't look quite right...