The article was posted at about the worse possible time for wages in 20 years, just a year later the median wage growth would have been about 5% more, 10% using most recent data. (Pre-pandemic, the pandemic skews median wages higher since the lowest wage earners are disproportionately laid off). Growth has been even better for the lowest decile (poorest workers), with real (inflation adjusted) wages increasing 12% in just the 6 year span since Q2 2014.

Even ignoring that, per the article, wages had increased amongst all deciles of worker at a rate greater than inflation, contrary to the initial claim that it hasn't kept up for the vast majority of people. Saying that the richest workers have experienced greater gains than the poorest is a valid complaint, that poorer workers' wages haven't keep up with inflation just isn't reflected in the data.