Back in the olden days of 'O' and 'A' levels -- grades where awarded on a percentile basis.
This measured the student abilities against their peers - someone awarded an A-grade was in the top-10% for that year regardless of their actual marks, and largely decoupled their grade from the quality of the course or the teaching.
Now the "modern" courses seem dumber in their marking - just grading for marks and pressuring courses to produce more high-grade results. Grades are no longer a way to tell the quality of a candidate if all the munchkins have A*++-with-sparkles.