They could also push carriers / agents to keep checkin queues short by fineing them.
Oh yeah, sure. That's a great idea, all you have to do is stop pax asking 300questions and debating every point at the check in desk, "window or aisle seat?" Do feel free to make suggestions when you know more about the airline industry.
BTW when T5 opens you will find even less staff as check in is to become more automated through on line check in and self service devices.