Actually the opposite was stated in the paper.
> This compression accelerated in 2021: real wage growth in the bottom two deciles remained positive and close to its pre-period pace, while all other deciles experienced declines of about 2 percent, roughly four percentage points below their pre-period growth
Isn't deciles every 10%? The top 90% is too rough, you need to compare the top 0.09% and the rest to see how much the social gap has widened