If it only becomes a problem for the Chair, then already it's a step in the right direction. Right now, both the Chair and the committee member asking the question run into difficulty.
You'll see for yourself what I'm talking about when you come face to face with certain witnesses, as I'm sure you will. You'll see what happens when you ask a question and the witness goes on and on. We could always complicate matters. I'm proposing a fairly simple solution whereby witnesses would also have three and a half minutes to respond. I didn't want to get into specifics, but that can easily be done. All that's required is for the Chair, or most likely the clerk or some other staff member, to keep a close eye on the clock, much like in a hockey game.