Giving up half of the local property taxes in a high wealth area to poor districts accomplishes the following:
Better paid administrators in poorer school districts.
Coppell ISD, Highland Park ISD and Plano ISD all give up enormous sums to Robin Hood. They still find a way to succeed.
Edgewood ISD, a recipient of these funds, is still a poor area with poor education choices in their public school systems. At least they have a strong parochial school system in the San Antonio area.
And that improves the quality of teaching?
If that's all Robin Hood accomplishes, then RH is an even larger failure than I thought.
IIRC, it's closer to 70% for Highland Park.