Some people stay because they “feel bad” that things will collapse if they leave. They buy into the “we” feeling at the company as well as tribal culture. The business doesn't care about you, its only obligation is to shareholders and given the climate, people like that are about to find out the hard way in the next 12 months or may already have.
I'm saying this as someone in a senior management position with equity and other shenanigans, having witnessed my fair share of key people leaving and being forced to pick up the slack. Do I blame them? No, because companies may turn around and screw even me, any day of the week they so choose.
So unless you own a sizable amount of the company, just do better for you. How businesses are run is in need of serious change. A lot of people are going to lose their livelihoods in the next year and there will be no kumbayas.