Educate yourselves. If you're gonna tldr, at least read the "Social democratic parties' move to neoliberalism" section
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Regarding corruption, just compare most of Europe's rating with the US's.
Bottom line: there is a very significant socialist element in European politics, has been for generations, and corruption is hardly a universal problem for them. Corruption in North Europe and the Nordic countries is actually less than in the US.
More to the point of the thread, I'd say growing wealth inequality is mostly because of refusal to adapt. Many people actively oppose looking for and trying better ways of doing things, i.e. working smarter. Doing the same thing again and again while expecting a different outcome is not realistic.