Most countries, esp. in Europe, don't even have high school graduation, you just leave at a certain age. You have to use actual certification to demonstrate English & Math skills.
So I think this move in the US is just a cost reduction to get children out of education at the state's expense.
Those who leave school without English & Math certificates who need them later in life, will have to pay for them personally.
In the UK a person leaving High School at 16 needs to be in Education or a Job with Training.
Most countries, esp. in Europe, don't even have high school graduation, you just leave at a certain age. You have to use actual certification to demonstrate English & Math skills.
So I think this move in the US is just a cost reduction to get children out of education at the state's expense.
Those who leave school without English & Math certificates who need them later in life, will have to pay for them personally.
In the UK a person leaving High School at 16 needs to be in Education or a Job with Training.
https://nationalcareers.service.gov.uk/careers-advice/career-choices-at-16
Although it doesn't specify then penalty for failing to do so.