My understanding of injecting money in education is that it's proven to be extremely ineffective at improving outcomes.
Schools just hire more administrators and build nicer gyms.
Well yes, you have to spend the money wisely. How could we construct a system so that we have 2x as many teachers (thereby halving the classroom size)? That would have a lot of good second-order effects beyond test scores.
Maybe don't just 'inject' it.
Maybe use it to increase outcomes.
What about into research grants?
You have to wait 20 years for the returns to society. Public education was enormously successful when it was introduced in the 19th century. There's just no profit in waiting for second order effects to kick in.