When I was at Tel Aviv University, at the time #7 in the world in cited Mathematics works, a TA once told me they were told the method for supporting students is nicknamed "foam": Foam rises to the top. In other words, if they can't figure it out, there's no incentive in helping them, because they're not going to become PhD researchers, not going to create citeable papers, and not going to get the University a budget increase.
This meant the university was comfortable with a low grade average, because school in Israel is subsidized - they're not competing for students, and the proportion of people with a BA/BSc in Israel is among the highest in the world. The only thing that mattered is more research, which means more grants, which means more staff, which indirectly means more professors to throw at teaching.
In all my time at TAU, I only encountered one Maths professor who wasn't faculty, so it seems the system was working.
This meant the university was comfortable with a low grade average, because school in Israel is subsidized - they're not competing for students, and the proportion of people with a BA/BSc in Israel is among the highest in the world. The only thing that mattered is more research, which means more grants, which means more staff, which indirectly means more professors to throw at teaching.
In all my time at TAU, I only encountered one Maths professor who wasn't faculty, so it seems the system was working.