I mean, if you put enough effort into disincentivizeing kids from attending to school, maybe they'll go back to work in meat packing plants and coal mines like god intended!!
For a lot of situations kids will do what you want them to do if you actually explain why you want them to do it. Furthermore, public schooling is not one of those things, because 13 years of it is clearly not best for some students.
If it were about minimum knowledge than you would be able to test out of it, and those not meeting minimum requirements wouldn't be able to graduate. But as it stands the top 10% of 8th graders know more than the bottom 30% of highschool graduates.
I got at GED. I also got a perfect score. Not because I'm some sort of genius, because there was not one single thing on it I hadn't learned by the end of middle school.
No. When you go under 16 you are talking about a child that is too young to make executive decisions in the outside world that would be expected of an someone with a GED. High school and GED are culturally signs of being ready for adulthood. Under 16 is too young.