Earlier quoted context omitted.
Replace exams with vivas and see how far the cheats can get. At least make a viva voce a large proportion of the final score.
Probably the best way to evaluate people, I guess it just doesn’t scale that well…
Vivas work,they are just expensive. The alternatives are cheaper but don't work.
Of course it could be that different people have different goals in mind. Some just want the diploma, others want to master the subject. So it depends on what the diploma is supposed to mean. If it just means: turned up then a viva is of course unnecessary and wasteful.