They seek to accomplish this by pulling down those who would otherwise excel, not by solving the real problems that are preventing people from excelling in the first place.
Part of the problem is that outcomes can never be equalized. It's a fallacy to try to force everyone into the same educational mold. A statistical normal distribution will always occur.
Better to remove impediments that are keeping people from excelling -- things like poverty, crime, etc. would be a great place to start.
If all (e.g.) 7th graders must have the same knowledge of math, that knowledge of math cannot exceed the knowledge attainable by the dumbest (read: any) 7th grader. This is tautologically true.
What is your solution to enable high quality curriculum and ensuring uniform success?
What did you mean by equalize life outcomes then?
again, what is your position and proposal?
The only noteworthy difference is defining acceptable failure rate, which neither of you did.
2) Can no student advance until everyone has mastered the material?