Look to Spirit as an example of what happened durning the last recession. They bargained for a substantial contract against Indigo.
In fact during the last economic downturn their pay went above a few majors.

And to “unprotected pilot” who started the post, who cares if they say where the growth will happen. So much of the US market is under served by the ULCC business model F9 can throw darts at a map, start service there and be successful.