Not really that easy. Every express carrier out there seems to fly for more than one major carrier. Also with all the legacy carriers hiring you wind up poaching each other's pilots.

What will cure the shortage myth will be significant reductions in 50 seaters and not a one for one replacement. Also consider the number of qualified pilots that are no longer active in the industry ex Comair comes to mind and others that left just because the regionals became a deadend with age 65.

Don't buy into the shortage myth. There are still student starts and more applicants than jobs at the majors. With reductions coming in airframes at the regionals I bet there will never be a shortage.