What countries fund education better per capita than the US? Can you give numbers?
According to various sources, for example https://nces.ed.gov/programs/coe/indicator_cmd.asp , US per-student K-12 education funding is only behind four OECD countries: Switzerland, Austria, and Norway (and far behind Luxembourg, which is an outlier).
The US is ahead of highly developed peer countries like Ireland and Belgium, and *way* ahead of the OECD average.
Meta-point: It irritates me when people assume the problem with US education is low spending, because the US education system is obviously so bad that that must be true, when in reality the problem is much more complex.
In my experience the people who believe this never have numbers at hand; they are just shooting from the hip.