Your beliefs are also irrelevant here. If prices were dropping, inflation would be default be negative. That is, deflation.
I would think that intentional inflation is a signal to spend faster, holding money is bad. Nothing to do with theft.
Of course it is all predicated on wages/inflation in step which does not seem to be true.
I think the big one is at the large scale: government reducing it's debt burden by devaluing the currency that is used to repay their creditors.
But even on the small scale it seems like they win:
Let's say you have 100k in a HYSA that yields 5%. And the inflation rate is 10%. Not too far from current numbers.
After 1 year, your real (inflation-adjusted) return is -5%, so you've lost 5k of spending power. But then, at tax time, you have to write a check to the govt to pay taxes on your 5k "gain".
https://www.thebalancemoney.com/who-owns-the-u-s-national-de....
For example: think of the retiree who holds most of their nest egg in (nominal) treasury bonds.