Review Detail of Acetz in A Will Eternal

The story presents a 500 years master who died reawakening when he was 15. Without a background but with 500 years of experience (this is repeated every chapter) he climbs to power again. But to do this without money he just extort his classmates biting then up (what is a Pilar of the whole story of how he could gain power). That left a BIG question, all those other students are so stupid to not come up with other methods to not get robed? Using the money (energy stones) inside the academy or fighting all together, etc... it's really stupid the plot.