Including bonuses, average first year pay is $31/hr. PSA offers no bonus and their first year pay is $24/hr.

Currently about 15/month are leaving(including FO attrition). No more than 25/month are coming in, with a net gain of 10. That's enough for only one additional airframe per month.

How will the company attract enough pilots with it's below industry first year pay?

The only regional with lower first year pay is Mesa.