Just as the ‘poverty line’ determines what’s required for basic living, we need a ‘wealth line’ to show when extreme wealth becomes harmful Just as the ‘poverty line’ determines what’s required for basic living, we need a ‘wealth line’ to show when extreme wealth becomes harmful I t was bound to happen eventually: Elon Musk has become the planet’s first trillionaire . Until recently, economists who spoke about “trillions” were describing the GDP of the largest economies or the accumulated value