The prosperity is NOT evenly distributed, or even distrusted in a shape that follows historical precedent (until you start looking at the gilded age, which was quite problematic!) mid 20th century America had a very healthy middle class that is now rapidly dwindling. Ironically this is often the time period people refer to as "great" but decry the tax policies that made it possible.

The average person (you and me) are much more productive, but have actually lost our share of wages relative to our productivity compared to our parents and grandparents. That extra production we're doing is almost entirely captured by the top 1% of the population, it's literally been taken away from us.

And contrary to our "billionares create jobs" friends, what billionaires do by and large is hoard wealth and power of a scale most people can't even begin to grasp.