Inflation is a symptom of the lack of some real resource. There are many parts of the economies of many countries where there's unused production capacity which simply "turns more natural resources into more stuff" if more money enters that part of the economy, without producing inflation. It's not "just spend more", it's "spend as much as you can on things that you want done, which aren't limited by real resources."

I found Randall Wray's lectures on the topic to be eye-opening. If what I wrote sounds strange, and it might, I highly recommend watching some of them. There are a few recordings on YouTube.