@rbreich
The bigger problem is that the airlines routinely oversell flights, even when they know complete flight crews won't be available to staff the flight so it's the reverse The Producers where no one checks the books when a Broadway show flops, when flights are flown without a hitch no one notices the fraud (other than the handful of customers who get bumped from oversold flight). However when there's cascading failure and more than 100% of capacity get their flight canceled it is apparent