My Australian OAP has cost of living adjustments every six months, in line with inflation.
I recently spent two nights in a government hospital, 7000 baht. I might pay that much for a single specialist consultation in Australia. They charge like wounded bulls.
At my current rate of capital depletion, which is added to my pension for a comfortable lifestyle, I will be reduced to having a pension only when I am 105 yo.
Yes, the AUD loses purchasing power in Australia. AFAICT the baht still buys all the stuff I need.
Having said that, people who come here hoping to live on a pension alone are in for a rude shock, when the first unexpected expense appears on their horizon.