Bullshit. Numerous analyses show a significant impact of increased funding on scores, graduation rates, and college attendance, especially more funding in areas that serve low income students.
This article summarizes some of that work.
article said:
The studies don’t provide clear answers on how to best use new resources, though,
If they can't say what works I seriously question the quality of the studies. Note that most of these studies involve cases where people voted for more funding vs places where they didn't--in other words, the samples are biased.
Disingenuous hand waiving dismissal of rigorous and sophisticated analyses you clearly don't understand.
From the TX study where the extra money has nothing to with voting for more $:
"To do so we leverage a long-standing rule in the state funding formula for Texas’s public schools
that grants additional per-pupil allotments to geographically large districts with few students. We
exploit the fact that the formula is discontinuous in size, at 300 square miles, and is kinked with
respect the number of students, at 1,373. Since the true relationship between size and sparsity and the
cost of educating students is in all likelihood smooth, we can exploit the difference between the true
smooth relationship and the kinked and discontinuous formula as a source of variation in per-pupil
funding. Because this element of the formula determines in large part base per-pupil funding for
districts, this variation is meaningful in determining per-pupil revenue and expenditures. Our data
allow us to observe districts receiving more than $1,600, or 13%, in additional per-pupil revenue
that is arguably unrelated to the true cost of educating students."
Another study compared the effects of spending increase votes, but compared districts where the ballot measure was just above the passing threshold vs just below that threshold. It compared 900 districts across 7 states, using numerous control variables including year, number of enrollments, expenditures per pupil one and three years
prior to the election, as racial makeup of the student body, SES of the student's families, and rural vs. urban.
They looked at gains in student test scores and graduation rate from across from the election.
The Wisconsin study also compared the effects of extremely close elections within 1% of passing or not, showing no differences pre election on numerous control variables. They also control for voter turnout and other referenda put on the ballot that year. They also look separately at ballot measures requiring the use of funds for capital layout (construction and building maintenance) versus operations costs (teacher compensation, class size, and other factors directly related to instruction quality). Only passage of increased operational funds predicted improvements in student outcomes, which controls for the district and voter characteristics related to approving tax increases related to schools.