Is the earning of a school that provides a female teacher to teach adult males unlawful (haram) or lawful (halal) with sin, and what is the ruling on the earning of the driver who works for it?

The school should not bring a female teacher to teach adult male students, due to the lack of adherence to Islamic guidelines regarding interaction between men and women. However, if this occurs, the earnings of the school and the salary of the driver, or anyone not directly involved in the teaching, do not become unlawful. It is incumbent upon whoever witnesses a reprehensible act to strive to change it with their hand, tongue, or heart. Indeed, guidance is achieved by fulfilling one's duty, and whoever fulfills it will not be harmed by the misguidance of those who err.