None of what you are saying actually contradicts the sentence. More men would be over-rewarded, because more men work from the office. This is bad for the emp

None of what you are saying actually contradicts the sentence. More men would be over-rewarded, because more men work from the office. This is bad for the employer, but it is also bad for the under-rewarded employees (they would be missing out on the normal rewards which should go to them).