https://portside.org/2017-12-18/inequality-and-politics

'More recently, rising inequality has had much impact on the political process. Greater income and wealth in the hands of top earners gives them greater access to legislators. And it confers more ability to influence public opinion through contributions to research organizations and political action committees. The results have included long-term reductions in income and estate taxes, as well as relaxed business regulation. Those changes, in turn, have caused further concentrations of income and wealth at the top, creating even more political influence.'

Robert H. Frank , an economics professor
at the Johnson Graduate School of
Management at Cornell University