These are the people who have to do all the work you are asked to do. That includes government bills and any analysis that you consider appropriate to do when submitted by members of Parliament, no matter what party they represent. Eventually, you may have to take on a new responsibility, that of analyzing all the financial programs of political parties during elections.
I just did some quick research on the Congressional Budget Office in the United States. They have 250 economists and various other employees.
I have a harder question for you but I am going to ask it anyway. What should be the ideal staff make-up of the Parliamentary Budget Office in order for it to be able to fulfill its present and potential responsibilities?