So what is the worst staff turnover that you've seen at a company? And what were the causes behind it? Let's exclude part time fast food jobs, just financial services firms.
I was at a small IB boutique where annual staff turnover was c70%. There were a few management roles that were pretty stable over the years, but all other staff from analyst to MD came in and out as if via a revolving door. A few were fired but the overwhelming majority left because of the CEO's attitude/personality.