Here is a discussion of the exchange rate.
https://marginalrevolution.com/marginalrevolution/2024/06/milei-update-3.html
If I understand correctly, allowing the peso to float and find its real value (what one would expect from a libertarian government, no?) would increase inflation. Since lowering inflation is the main - maybe only - achievement to date, the peso is being kept artificially high. I'm not an economist so maybe some more knowledgeable person can explain it.
As for Redpossum's plight - and I suspect that of many expats who have stayed on, the question is just how long this can go on and how much worse it will get. It seems to me that the middle class are being crushed.