Di Vosh, what else would you call 20 aircraft attempting to arrive in half an hour when the system is configured to handle 12 in that time? Because that's what happens and guess what? You cop a delay.
Is the concept of scheduling to fit within current capacity and if you exceed it there will be delays beyond an airline employee? We aren't employed by the government BTW. Capacity isn't some magic pudding that can miraculously expand to fit another couple of arrivals an hour on a whim. It's a whole bloody great cumbersome system.
What do you think I can do as an individual controller?