I hope that eventually as more and more people realize how much more they could make at big tech (IME a lot of people just straight up don't know, esp. when a lot of the comp comes as equity grants), startups will have to start paying more/offering bigger slices of equity. But seems we're not there yet.
I also wonder how much of this is driven by software engineers who couldn't (or, probably more realistically, don't think they could) get a job at Big Tech?