However, the lifestyle of the $400k/yr worker is probably closer in most important aspects to that of the VC than the janitor. Both drive expensive cars, live in expensive houses, and can set up their kids for success. They don't worry about the cost of food (even organic/local/etc.) or worry much about health care.
Put another way, there are probably some $40k/yr janitors who would give their left arms to be making $400k/yr. But I doubt there are any $400k/yr tech workers who would give their left arm to be making $4m/yr.
I'm a software dev, I don't make 6 figures. I'd probably give my left arm to make $4m/year, I could afford a robot arm with that I'm sure.
$4m/year means I could retire before I'm 40 and live the rest of my life with the lifestyle I have now with comfort. Even missing an arm that sounds way better than toiling in software for another 25-30 years.
I would be able to retire after 1 year, $4M is enough to just stick in an index fund and live the rest of your life on 4% a year, unless you live in a very high COL area.