on the face, it should be pretty easily sustainable based on the profit per employee these companies make. i guess we just really hate anyone but shareholders actually getting a piece of the pie.
I checked a few days ago and the revenue per employee at big tech is eerily similar to "Biglaw" and non retail banking (Jones day, >200k entry level, goldman is similar) at 1-2mil per employee. One could argue the market for IB/trading has been saturated by applicants for years but they pay is still well above norms ~>150k entry level. Pretty interesting.