If your parents just funded a new wing at the university, you may well graduate summa cum laude, in addition to contributing a couple of million to the endowment fund to get entrance in the first place.
That has less to do with qualifications, and more as a requisite prestige ornament in the curia vitae.
Basically, buttressing ye Social Standing.
Curiously, in a British Broadcasting Corporation interview, one of this year's Advanced Level recipients observed that their graduate year will always have an asterisk, due to how their scores were calculated, and apparently inflated.