How is the middle class nearly gone? Inequality has increased, and I think this is bad, but I don't get the point of an over-the-top statement like this. Medi

How is the middle class nearly gone? Inequality has increased, and I think this is bad, but I don't get the point of an over-the-top statement like this. Median household income in the US is over $60,000 (source: https://fred.stlouisfed.org/series/MEHOINUSA672N https://fred.stlouisfed.org/series/MEHOINUSA672N). How is that gone?