Wealth and income inequality are only bad insofar as they have an effect on consumption inequality and leisure. (Another issue is that wealthy people may use their money to get politicians to pass laws that are harmful.) When people who are richer than you spend their money on yachts, the resources (labor, materials) used to build the yachts can't be used to provide other people with cars, food, homes, computers, and drinks from Starbucks. Since billionaires have most of their money invested, income and wealth inequality matter much less than the news try to make them seem.
According to this article, though, there has been an increase of consumption inequality from 1980 to 2005 in the US according to various papers: https://web.stanford.edu/~pista/JEP.pdf. But the consumption inequality is far less outrageous than income inequality and can be estimated to have been in decline in the world at large through data from the World Bank's DataBank.
According to this article, though, there has been an increase of consumption inequality from 1980 to 2005 in the US according to various papers: https://web.stanford.edu/~pista/JEP.pdf. But the consumption inequality is far less outrageous than income inequality and can be estimated to have been in decline in the world at large through data from the World Bank's DataBank.