I do try and keep an open mind :). And 3% was perhaps the low end of the scale I could have estimated.
On the other hand, I do think you overestimate the skill of employees in general. Just ask around how many of your colleagues think they could pass the job interview for their current position right now - that percentage is generally pretty low (especially at places like Google, where interview training is basically a full-time job).
Quite often, people that "are still there" are simply still there because they have made themselves indispensable, e.g. they write working software, but no other person can understand their code. Firing someone like that is a business risk - not firing someone like that isn't (immediately).
On the other hand, I do think you overestimate the skill of employees in general. Just ask around how many of your colleagues think they could pass the job interview for their current position right now - that percentage is generally pretty low (especially at places like Google, where interview training is basically a full-time job).
Quite often, people that "are still there" are simply still there because they have made themselves indispensable, e.g. they write working software, but no other person can understand their code. Firing someone like that is a business risk - not firing someone like that isn't (immediately).