All else aside, do "secretary pools" even still exist? At the very least I've never come across any at any of the companies I've worked for. I am near certain they do not exist at my current company; I've interacted with "executive support teams" (not called that, each individual on those 'teams' has their own job title and role) on several occasions and none were what I would call a "secretary pool".
> All else aside, do "secretary pools" even still exist?
Mostly, pools of clerical support staff have been both subject to reduced demand and outsourcing so that capacity is provided at-need from temporary/staffing services (though I've encountered some places -- specifically universities -- that have their own temporary employment pools that include, but are not limited to, clerical staff.)