Stagnant wages are the cause of multiple effects, many of them that are extremely localized. The US has had this effect, but the world has had it go extremely upwards in the last 5 decades. And along lower wages, have come increased value. The internet, for example, is super cheap and might not count as much into the budget of a person todaY: but tv and entertainment was a much higher cost between cable, newspapers, etc etc.
Smartphones, safer cars, cheaper travelling. Have to be very careful to look only at nominal bills to make economic judgement.
And maybe the most problematic and expensive things americans suffer generationally, housing and healthcare, are the defacto most intervened and regulated markets of all. It is the state, in its magnificent regulatory capture, that its pushing poverty unto people.
Also inequality has always been a topic of conversation, what is new is income inequality, and its still an open problem, not something there is economic consensus about. There are other things that have economic consensus, for example, getting rid of corporate taxes. But you dont hear that coming from "high inequality and stagnant wages" guys.