More than 100 millionaires say current tax systems are “not fair” and increasing wealth tax would help resolve inequalities made dramatically worse by the Covid health crisis. Millionaires from around the world have signed an open letter asking governments to tax them at higher rates. The letter was published online Wednesday, mid-way through Davos, the World Economic Forum’s annual meeting being held virtually this year. The signatories of the letter, which was the result of a joint initiative from inequality advocacy groups Patriotic Millionaires, Millionaires for Humanity and TaxMeNow, said current tax systems were “not fair”. While only 100 millionaires...