There are no stakeholders. Canada is not some kind of company where you can buy shares of. There are only elected PPM or other responsible positions which were nominated by elected government of Canada.
So at the very end it comes to the wishes of the majority of the voters. And that majority wants most of the time prosperous country, which comes in turn down to the Money income against Money expenses.
As Canada is getting older, they need to import fresh workers. But as the demand is so high they do have the right to choose. With that said they can sell the whole immigration offer as a business where you need to secure most points in order to be able to immigrate.
So they push on anybody that is not close to perfection and at the same time offering the ways how to increase those points.
And the most effective are to come to work canada on LMIA extempt (which creates more Money from taxes from those people) and ofcourse come to study in Canda.
With studying you will pay 20k+ for studies, then you get PGWP to catch up for that Money but all and all that will kind of lock you with Canada as with the place of preference to immigrate. Hence the big points reward.
So as long as there will be enough people willing to invest time and Money to increase their points, there is no need to decrease CRS score (this is so called seller market, where Canada is "selling" the right to immigrate).
In reality the difference between somebody with 330 points and 450 is little to non existant (both can have bachelor degree, 6+ years of experience and very good 1 language), it is just that one was maybe studying in Canada with 1 year of canadian work experience after and was repeating IELTS in order to get the magical 4x9 cbl. The other one has studied in his country and has plenty of work experience, but he just so happens to be older and missed in one language score the needed CBL 9.
In work process in itself there will be very little difference between performance of these 2 candidates. (the FSW can have first 3 to 6 months slower start but then he or she catches up).
But the main difference for Canada is, that the first one already brought in more Money than the second one.
That is the reality.
So the talks about score dropping down (especially under 400) are more like mercifull lies to keep different candidates interested. Sooner or later most will find out how the realiy Works and they will either let Canada dream be or they will hunt more points.
As simple as that.
