there hasn't been a single solution for all problems since humans sort of know that solutions can exist. a bit of every step towards a better situation, and a bit more and more until it fits. i cannot say when it will fit, but destroying the future of whole generations is more like the definition of unfit than an achievement. it might be seen as glory by some confused and rich, but its filthyness in reality.
reduce demand-producers, reduce overall irrelevant work, that is i.e. all work done solely for increasing numbers on bank accounts that don't even change anything for that account owner any longer. we do ship things around the world that really should get processed locally. there are many things that are wrong only for keeping the pyramid schemes of the rich active.
Europe actually payed a lot for this "military service" including interest, the us made a lot of surplus money from their "insane amount of money they pumped into europe" so thats actually not called "pumping money in", but "invest in war and squeeze more money out"
https://www.warhistoryonline.com/instant-articles/britain-only-settled-debts.html
Also germany payed (or actually continues to pay, not sure) yearly huge amounts of money for us military stationed there. And that military germany pays for isn't even there to only protect germany, but to help the us with their invasions into other countries too.
some countries where the us squeezed money out or resources out or invaded, destroyed or undermined democracy a.s.o.: https://www.seedshirt.de/us-world-domination-tour
and thats not even the full list.