Consider this example:

I run the EMEA division of a multinational, I want to justify a bigger budget and/or get a bigger bonus and so I hire a data analyst to prepare some reports showing my division in a favourable light. The reports are well received and have desired effect for the first year or two until my competitor who runs AsiaPac realises what's happening and also hires a data analyst. The situation then returns to normal, but the company now employs two more data analysts than it did a few years ago. Neither one of us will fire our data analyst for fear of looking bad, but the data analysts are in competition and so have no net benefit to the company's performance or humanity as a whole.