Testing standards
yamada
From what you say you must know the candidate and are also instructing at the school. You should decline to test the student if you consider them not fit. You can hardly blame the system if you are weak and can be bullied.
The average PPL candidate undertakes in the region of 60 hours to complete. 33% excess of the minimum required. Schools appear to be acting very responsibly. Most serious accidents involve 200-300 hour pilots, out of the control of the schools therefore and a number of years will have past since their test.
How many hours on average are your schools students completing?