Prop 13 limits property taxes which are typically used for funding local schools. The comment is implying that it’s low school funding in Ca that is the culprit.

Property prices in California have skyrocketed in the last decase, and so have tax revenues. Spending more money wastefully won't solve the problem.

I understand now thanks. That point doesn't make sense to me in the context of the article because the article is claiming that black and Latino gifted children were under-scouted until the BLM movement. Seems that this and that are 2 different issues.