[logifail]

> Adds a pretty big extra layer of thought [..]

I don't think the average <employer/line manager/assistant actually making the phone call> cares about it nearly as much as one might think they would:

Boss: "we need to reach $person urgently, get them on the line for me..." <walks back into office>

Assistant: "Sir, yes, sir"* <looks up numbers, calls $person's wife>

* or local equivalent

[hanniabu]

Not just that, but they also need to convince your wife that you're needed