Bro where are you working where the typical engineer is making 20k a month?
Rsu is the largest part of comp for a senior person so more that half. So add another 300 k on top of that.
That’s a comp of close to 600k a year or 50k a month when averaged out.
FAANG pays that to new grads. (500k stock over 4 years and 140k salary is pretty standard).
I've worked at places also where 105b-1 plans were generally available (sell all shares at vest even outside trading windows), in which case employees were absolutely receiving 40k+ liquid cash a month. Many senior engineers were receiving substantial more than that.