The NHS might not appreciate their loyal workforce but the public really do. How has this inequality developed? Why hasn’t it been stopped ( legislated against ) ?
Supply teachers don’t get extra pay for covering for absent staff, in fact they tend to get paid less than the normal teacher.
NHS a staff need more pay , better working conditions , flexible hours, active recruitment to fill vacancies on permanent contracts, and fully staffed wards. That should be a baseline on which to build.