Worked as a temp for the IRS equivalent in my country. The degree of understanding and professionalism was unexpected. We were just overworked, mostly because the systems were really not up to date and had a few directives that were a bit inhumane (first time asking for a delay=> ok in all cases, no explanation needed. 4th time=> NOK in all cases, expect interests.). For people who couldn't afford the taxes, we had really knowledgeable people taking a lot of time finding ways of rebating taxes, people who could make 10x working as taxes lawyers and making a better job at it than actual lawyer (in my skewed perspective, don't quote me on that).