Buttonwood (2017) alerts about the grave consequences the rising wealth inequality within and between countries may have worldwide if the economics profession and the policymaker do not manage to address this problem properly. He notes that manmade ways that have brought down this problem whenever it emerged in the past was mass warfare, genuine revolution, and state collapse. Based on a dynamic wealth accumulation model, Pikkety and Saez (2014) suggest that wealth inequality starts rising when the after-tax rate of return on capital or the same, the capitalization of past wealth exceeds the growth rate of the economy. They caution against the confusion between (personal) income and wealth (factor income) inequality as the former may become
