This has been the strategy used by families around the world for thousands of years.
Have some kids, pick the one that seems like they'll be the most successful, put all of the family's limited resources into that one kid. If that kid goes on to become successful, they are expected to help lift up the rest of the family.
Another view is that I've paid back in taxes alone, many multiples of what my education cost the city.
> feeding a horse a huge amount of oats results in some of the feed passing through for lucky sparrows to eat
Yeah well the current strategy being employed is starve all the horses and leave the bodies in the field to rot.
The harsh truth is bell curves exist. Some people are just better are things than others.
Imagine a scenario with three classrooms:
One classroom is full of kids who can be taught 3 years of a subject in one year
A second classroom has kids who can be taught 1 year of a skills in a subject in 1 year.
The third classroom is kids who are remedial and if great effort is put in, they'll be taught one year of skills in two years.
The no-shit-sherlock strategy is to assign a teacher to each classroom.
What we are doing instead is one of two strategies:
1. Mix all the students together, and watch as the kids who would be advanced drop out of school due to boredom, and the kids who need remedial help drop out because they aren't learning anything.
2. Fund classroom 2 as normal, take resources that would've been spent on classroom 1, and give it to classroom 3, causing incremental improvements, and again failing the kids who would be in classroom 1.
Both strategies are downright stupid and inefficient.
Not only that, these strategies also cause funding problems. Now the parents of kids who would have been in classroom 1 pull their kids out of school, causing a reduction in funding for everyone. Next, parents who would have kids in classroom 1 don't even move to the city, causing a reduction in the overall economy for the city, so now there is even less money for social and academic programs to help disadvantaged students.
To be clear, I'm not naming the subject here because students should be independently evaluated on each subject. Someone may need remedial math help but be great at writing.