An increasing number of billionaires are embracing the viewpoint advocated by Microsoft co-founder Bill Gates, who has called for increased taxation of the super-wealthy. During Gates’ annual “Ask Me Anything” session on Reddit last year, he said ultra-wealthy individuals should pay more tax. He vigorously reaffirmed his position at a panel during the World Economic Forum in Davos this week. The billionaire made a compelling case for the wealthiest nations to substantially augment their contributions to address global income inequality. He also emphasized the moral duty for individuals, nation…