Earlier quoted context omitted.
Why is it always about more money? The US is usually in the top 3 spending per student (beaten only by small countries that represent statistical outliers like Norway or Luxemburg), so really, it spends the most. Yet, as many are quick to point out, all that money results in educational outcomes well below many European countries and also many Asian countries that spend far, far less.
The money is largely not going to teacher salaries, classroom supplies, or to anything that affects "educational outcomes".
Luckily, this is researched extensively, and schools must publish budgets. Typically, spending on 'instruction' is >60% of the expenditures, almost all of that is salaries and benefits. Capital outlay is usually around 8-10%, support services and administration around 10%, operations and maintenance around 10%, and around 5% for transportation/bussing.
Contrary to the typical claims that 'administration' or capital costs suck up all the money, the majority of the money does go to teachers' salary.