Some colleagues (especially those who have been in the company for many years) are plain bullies. Pushing work and redelegating their work to the newer colleagues with lame excuses.
Delegation of work is unfair. However the Director has no interest at all (especially those that are near the end of their terms.
If the director is a bully or plain apathetic, you just have to wait our his/her term. And a new tyrant will be shipped in with new rules, regulations and procedures. Every 5 years is a new set of process.
If they are new to office, they are fired up introducing additional paperwork. At times when questioned, they display no guts to stick by their word and change their instructions depending on mood or circumstances.
Pay increment is discretionary and dependent on the Director. If he/she bothers to put up the paperwork to fight for the local staff. If not it'll just be stagnant pay.