According to RYR management their rosters do not produce fatigue, so if you are fatigued it is your fault. Your ' suitability ' for the job will therefore have to be examined by personnel. Hence all pilots are too scared to say that they are fatigued.
In any case, as we are fatigued on a regular basis, if we actually all refused to operate in such a condition, my guess is that the company's business model would fall to bits. Once the race to the bottom has started there is really nothing unions, regulators or politicians can do. It's just economics.
I was told a few years ago that one of our crews stated in a safety report that fatigue may have caused them to make an error. They were told, it is alleged, by the boss that he did not want to see the word fatigue in any safety report as ' RYR did not have a fatigue problem ' ! This story may or may not be true, but the point is that all pilots knew about it and hence the fear was created, job done.