It isn’t a slippery slope. It is me showing you what is needed to achieve the goal. A slippery slope is when someone argues that if A then B must follow and hasn’t justified it, it is not at all the same as me saying if your goal is X you will need to do what you just said and more.
You fund them all the same.
I highly doubt your province is doing that because it doesn’t freaken work. This school has more kids that have special needs, this other school has more kids whose parents speak a different language at home, this school needed a major boiler upgrade last year, this school has poor students so needs to provide more school supplies, this school is more remote so they had to pay extra to get X, this school is more urban so it needs to pay all teachers a bit more, this school had an unusually low number of 2nd graders this year…
No government is so fucking stupid to try to do what you are saying. You can start with a baseline funding number and modify it as needed but you aren’t saying that. You are saying the equivalent of lawful stupid alignment for accounting.