Otherwise it may lead to economic ruin, or at least bad government policy!
Well not for scientists.
Earlier I posted that MIstakes happen in research, describing one of my recent ones.
Paul Krugman has a nice New York Times op-ed piece The Excel Depression which describes a flawed paper by two Harvard economists that led to a widely quoted claim that once government debt exceeds 90 per cent of Gross Domestic Product (GDP) economic growth declines sharply.
One of the mistakes the authors made was an Excel spread sheet coding error that meant they left five countries (including Australia!) out of their analysis. You can read a more detailed discussion here.