The 2% economic growth rate is an average. It might be the case that the average worker's real wage grows 0% (this is basically true [1]), while corporate profits, which make up ~10% of the U.S. economy [2], grow 20%/year.

[1] https://en.wikipedia.org/wiki/Real_wages#/media/File:United_...

[2] https://fred.stlouisfed.org/graph/?g=1Pik