There is very little correlation between per-capita student spending and student outcomes. We should fund our public schools adequately but no amount of funding can overcome a bad environment in a student's home or neighborhood.

And to be clear: we fund our schools at a higher rate than basically any other country in the world. We are fifth in the world in per-pupil student funding behind only Luxembourg, Norway, Austria, and South Korea.

https://nces.ed.gov/programs/coe/indicator/cmd/education-exp...