You can do whatever you want during periods of inflation. "It" will fail. The existence of a control group is meaningless. The control group will have bad outcomes too. So what if it does? Nobody can design interventions for periods of inflation, because inflation makes everything look bad: your outcome, control group's outcomes, everyone's outcomes.

For example, Brazil created their current public health system in 1988, realizing it in 1990, during inflation that was between 1,000-2,000%. It wasn't really functional then. Looking at it in isolation, at the time it was created, it would look like a failure, but all of Brazil looked like "a failure." Would it be valid to use SUS as implemented during 1,000% inflation as an example of why public health insurance is bad? No way.