I am constantly amazed at the number of executives who take calls when they're having a meeting, formal or informal, with staff. They seem to have a blind spot about the cost to the company of keeping experienced people standing around.
The maths tell their own story - if anyone stops to count. It's not only the wages when one or more people stand idle whilst waiting for a colleague, but also the lost opportunity cost.
What you can do if your boss is a consistently guilty party?
I've noticed over many years that when a staff member has a fair point and is prepared to have a 'courageous conversation' in a courteous way, that almost always it earns them respect from the more senior person concerned. The qualifier is that such conversations need to be constructive, forward looking and solution-focused rather than a negative whining criticism.
• How about asking politely, as you walk into a meeting with them, 'Shall I get the receptionist to hold our calls?'