Middle earners are at best holding steady in the US. Inflation doesn't always capture the full picture since inelastic goods (housing, healthcare, education &c.) are taking up a larger fraction of the paycheck.

The top 10% are doing fairly well, the top 1% doing better and the top 0.1% are making out like bandits.

I don't have a good solution, but the current state of affairs is unsustainable.