But some charter school networks, such as Success Academy in NYC, are overwhelmingly attended by low-income students.

Anecdatum: I have talked with a parent of fraternal twins who went to Success Academy. One twin did well academically. One twin struggled. The latter was managed out by Success Academy.

That's the core issue. Are schools public goods or private goods? Considering property taxes as user fees or de facto tuition definitely falls on the private goods side.

When an area of a larger city is annexed to form a smaller town with its own tax structure, isn’t it effectively opting out?

Thants not an accurate description of how vouchers work. Tax revenue still gets redistributed and split on a per student basis just like it would otherwise.

The real difference is the level of parental engagement and support.

School districts want to retain good students & parents for the exact same reasons those people want to leave.

Rich students are dragged down poor students & parents, but poor students are dragged up good students and parents.

There is clearly a winner and loser to the arrangement, but it isn't because the school gets less tax revenue per student.

The following is satire.

Tax revenue would get redistributed on a per car basis.

The real difference is the level of driver engagement and support, of which roads get maintenance.

Road districts want to retain good vehicles & drivers for the same reasons those people want to leave.

Rich drivers are dragged down by poor drivers, but poor drivers are dragged up by good drivers.

There is clearly a winner and loser to the arrangement, but it isn't because the road gets less tax revenue per car.

I'm not sure what the point of your satire is.

It would be more accurate if some citizens were doing additional road repair and cleaning outside of the government, and other citizens were digging potholes in their free time.