This cartoon from The Seattle Times illustrates how America's economic pizza is actually sliced per capita, highlighting the massive disparity between the Top 1%, the merely wealthy, the upper middle class, and the lower 50%.
~600k per year
Why are you using income? It's wealth that matters and that's a ~$16M cutoff.
To reach that you'd need to be earning ~600k per year for 2-3 decades, to invest the majority of it, and to get absurd stock returns on top of that.