US vs Europe inflation https://www.bls.gov/opub/mlr/2006/05/art3full.pdf

"balance between true defense spending and healthy spending like feeding and educating children, infrastructure, R&D that helps society, etc."

Spending does not equal outcomes. There doesn't need to be a spending balance, but there should be an outcomes balance. We can see this with school funding. There are some schools that are underfunded and underperform, but there are also schools with adequate funding that underperform lower funded schools. The implication that you are making is that we could fix things just by cutting back military spending. However, we are also leaders in some of the areas you mention already, such as R&D. The Pentagon fails their audits frequently and should be trimmed down in areas that it makes sense. However, just shifting that money to education isn't going to make that much of an impact.