Oh, Locarno *did* fix the western border in OTL, although technically the Germans (and Belgians) quickly showed they were open to revision if the opportunity opened itself.And without Munich and the subsequent betrayal, Germany could be allowed to go after Poland by the Allies. Probably trade a treaty fixing Germany's western borders to placate France (and another limiting it's navy to placate Britain) in exchange for a free hand in Poland, if it came to that.
As an aside, hyperinflation had bad consequences for the economy simply for how fast it was, as well. It isn't all that good for an economy if the money you take out of the bank is worth non-neglibly less when you get to the shop, regardless of whether you were poor or not, and neither is it good if you have to print more money simply to put more higher-denomination bills out to limit wheelbarrowing (or, alternatively, if it is hard for people to take the necessary money to the shops).