Re: Oracle got there first
Many big American firms can the lowest 5-10 percent of their workforce each year.
It's not just American firms that do this. It's reasonably common in the City - many of my employers have used the 20-70-10 system: The top 20% get a pay rise, the next 70% get nothing but keep their jobs, and the lower 10% you fire, all based on that years performance review.
To be honest, even when I tried hard to get into the 10% because I wanted a payoff it was really quite hard to achieve, so hard in fact I couldn't make it stick.