HAA Geo modifiers  

Pilot shortage over? Afraid it may see a surplus if the HAA billing gets revamped.

So, business 101 here, once the needs are met the bonus/incentives go away...If they can't fill a base because it's in the middle of no-where, expensive, etc. the Geo-modifiers are awarded to attract. The modifiers usually remain. Some customers are such a pain that there are, at times, retention bonuses as well. 

Masks, you work for a company that contracts with the Feds...Each hospital seems to control their fifedom as well. If you fly in support of a certain customer, well, you may have to wear a mask.