The source of top incomes, who gets them and how they are taxed is important for understanding inequalities. How have top incomes and their source been changing over time? Who is in the top 1% - are they employees, or business owners or rentiers? How much tax do the top pay and should they pay more?
Many societies have become more economically unequal over the last 50 years; the world’s richest 1% now owns nearly 50% of the world’s wealth. What has driven this increase in inequality, and is it actually a problem?