In regards to Bernie, his premise is that wealth inequality is the core problem, which means tax the rich until they can't have an outsized influence on our politics.
We can keep telling ourselves Mark Cuban's "opportunity economy" was good enough but objectively it was a flop with working class voters. Either it was a messaging failure or it wasn't populist enough, Bernie is saying it is the latter. If it was a messaging failure, then we're likely to conclude it is because our media landscape is toxic. Bernie would agree and say that is why we need a populist message to cut through.
I thank we can develop state that our media landscape is beyond toxic. It's apparent that much of our population is getting fed information through tik Tok, Facebook, and YouTube. Learning how to game the system like the alt-right does would be incredibly worthwhile.