The university motto as you mentioned "มหาวิทยาลัยไทยเพื่อความเป็นไท" actually means "Thai university for the freedom". Literally, this motto has nothing related to cultural preservation. In this original sense, do you think that you have a fundamental freedom as a student at PNRU? Can you select the subject you want to learn or arrange your own schedule? For your second point, I understand what you are trying to say but I think you used the wrong term "corruption". The precise word should be "discrimination" which means treating people differently, for instance, these students took an exam to become students at PNRU why not those students? It's discrimiatory action. Corruption is illegal.