I can't imagine many 0-5 possibly 0-6 types settling for a regional, but with military retirement tucked away that's easily 6 figures with retirement + regional income.
At some point many mil types decide what is more important : being an 0-5 in the military with an ever so small chance of being a sq commander or greater, with a high probability of queep, deployments, political correctness albeit a stable retirement income..versus a decade of seniority / millions of dollars, living where they want, and doing what 99% of Military pilots love doing for a profession: flying.