I've seen this story play out before, this will end with either:
-Company Lawsuit (mistreatment of employees)
-Bankruptcy
-Soft-Firing (keeping her on for as long as legally possible without actually firing her, until she leaves on her own volition)
-Company Merger (needs to look good for the potential buyer/seller to go through)
My money's on Soft-Firing, because it sounds to me like them giving Airi tons of work with no increase in pay was their way of telling her to move on, but I feel like she may just have been that dense because...Well, she's Airi.