It was formerly the case in the United States that only land-owning males held voting rights. This was a misguided system of representation for obvious reasons.
However, suppose that school districts were run entirely by local boards elected only from the top 70-percentile by income of that district’s alumni. How would that arrangement benefit or hinder present-day students in the district?
This is the population who would presumably have the best understanding of the district’s shortcomings at the time they attended, so one would expect school boards maximally interested in the needs for their region’s students to succeed best in life.
Assuming a reasonable rate of geographic transfer in population, it would be difficult for any one group of people to manipulate the school system to benefit one local company or interest group to corrupt the students’ curriculum from what they need to succeed.