You'd have to be making 700k+ a year to be banking 300k after tax. Perhaps the valley slipped away from me but I find it hard to believe that there would be average employees in that range.
I did it at a FANG, and it wasn't 700k/year. Admittedly, this is the longest runup in stocks we've had for some time, but just prudent saving and investing (and possibly working for a FANG outside the valley) did it for me.