A 10% raise won't be nearly enough to keep pilots. In any case, it is less about he money then it is about the conditions!
90+ hours a month is unsustainable and the main driver of people leaving. Most contracts elsewhere are 75-80 month. They actually have a leave policy that works. They get treated well or better.
I won't rehash all the issues.
I doubt they will ever go back to a 76 hour month so if they don't increase pay 25% plus pilots will continue to leave. They will not stay when other pay the same for a 76 hour month and where conditions are better.
Keep treating the employees like they do and people will keep leaving.