I guess if Fox News is reporting this ...

Middle-class income highest on record: Fact check
Middle-class income was the highest on record last year, new data shows, but those numbers may be a little misleading.
But for those Americans still wondering where their pay raise is, there could be an explanation.
While wages in August grew at the fastest rate in nearly a decade, they are, overall, still below the historical averages experienced before the recession. They also rose because more people were working more hours, not necessarily because their pay rates actually increased, as reported by The Wall Street Journal.

Even Federal Reserve chair Jerome Powell admitted wage stagnation was “a bit of a puzzle,” given strength in the labor market and an abundance of labor shortages across a variety of industries.