IMF concludes direct causal relationship between unions and income equality

See this article for the details on the International Monetary Fund study, then ask: Who wants unions and who wants to destroy them? An excerpt:

"A new study from the International Monetary Fund concludes that unions reduce inequality and foster a healthier economy for everyone, mainly by preventing the wealthiest among us from keeping the fruits of a collaboratively created prosperity for themselves.The IMF study shows that a reinvigorated labor movement is essential to both a just economy and a well-functioning democracy."