Are we entitled to demand an increase in salaries and leave duration, in line with colleagues, especially since they do the same work?

If you work like your colleagues, then you have the right to demand equality in holidays and salaries, regardless of your income from another job. Justice must prevail among employees to ensure success and tranquility. You have the right to demand an increase in salaries and holidays, and the institution must achieve justice and reduce disparities as much as possible.