This is so provably false that I'm amazed anyone could have this opinion. The US spends huge amounts on education. More than almost any country. Neither education spending nor property taxes have declined.
Government current expenditures: Education
https://fred.stlouisfed.org/series/G160291A027NBEA
Personal Current Tax Receipts: State and Local Government: Property Taxes
https://fred.stlouisfed.org/series/S210400
US education spending is one of the highest in the world, and is also increasing 2010-2019 faster than almost any country:
https://nces.ed.gov/programs/coe/indicator/cmd/education-exp...