Education is a tough one. Like healthcare, it's highly subject to Baumol's Cost Disease. Technology holds some potential but fundamentally we still need a certain ratio of teachers to students, and those teachers get more expensive every year.

https://www.unesco.org/en/articles/baumols-cost-disease-long...

Education should be well funded. But at the same time, taxpayers are skeptical because increasing funding doesn't necessarily improve student outcomes. Students from stable homes with aspirational parents in safe neighborhoods will tend to do well even with meager education funding, and conversely students living in shitholes will tend to do badly regardless of how good the education system is. If we want to improve their lot then we need to fix broader social issues that go beyond just education. Anyone who has gotten involved with a large school district has seen the enormous waste that goes to paying multiple levels of administrators, and education "consultants" chasing the latest ineffective fad. Much of it is just a grift.