The reason for the majority of cancellations is "op adm", that is the company is cancelling the flights because of a lot of different reasons, but lack of crews and maintenance problems are not in this category. In fact there are maybe a handful of flights that cancelled yesterday for crews. They are cancelling flights that don't have a large amount of bookings, which they have done in the past, so as to save money. The pilots don't get paid for trips that are cancelled, not sure about the flight attendants. They also save on gas, wear and tear, landing fees and a multitude of other things.
So don't buy into the propaganda from AMR that the pilots are the problem here. This **** poor management team is the problem.