The richest 1% on the planet raked in nearly twice as much wealth as the rest of the world’s population over the past two years, according to a scathing report released by Oxfam on Monday. The charity, which issued its annual report on inequality on the first day of the World Economic Forum in the Swiss resort town of Davos, called for a tax of up to 5% on multi-millionaires and billionaires, saying it could generate $1.7 trillion a year, or enough to lift 2 billion people out of poverty. More than 50 heads of state and government are due to participate in this year’s forum – a record number -…