If you have contacts on the seniors who have left, call them, ask them if they like the companies they are currently working for, and whether the companies are looking for new hires.

In the job interview, give them the list of responsibilities that you have now. Then ask for a higher salary than you have now.

Jump ship. You'll forever be bargaining for the pay rise and if you do get it and don't deliver for whatever reason you'll end up shooting yourself in the foot. As the recent justification was for more pay.