The doggos are the tip of the iceberg. People are saying no to them, hence TIBA. There are still plenty of people covering holes during the day. I reckon we averaged 2 clangers a day in our group for the past 6 months. Our minimum staffing levels keep getting shaved, but the holes still exist. Mostly, they get filled. A lot are being done by newbies trying to recover the hit to the back pocket during 18 months of training. Some top end controllers are just sheer greedy. They aren't going to get too many complaints from the main carriers for the doggos because they're hardly up there. Melb Sydney has been closed for something like 7 out of the last 10 nights and no uproar yet. Might be different if it was during the day.