Originally Posted by AxialFlow

While you do have a vaild point that there are pilots at mainline carriers applying to other mainline carriers (and there always will be), it's primarily the junior guys who can risk the move without losing much. Probably not going to be as many guys at DAL/FedEx applying to Spirit/Frontier...
Also keep in mind that while SWA's pay is industry leading today, it was industry lagging pre-9/11.