That's a fair and valid point Kirks.
Problem is most expats will send money home either for monthly expenses (If they commute each month) or even if they stay in Turkey, they will save for retirement in other countries (most, if not all). So inflation definitely impacts expats more directly.
Although, it does also affect people living in Turkey. Whilst not immediately affecting prices, there is admittedly a lag, but it does indeed affect the Shopping and Rental prices here. I've noticed prices increasing quite rapidly in the Markets and shops, and we all know the Landlords seek a 10% increase each year on rent as a standard policy. Some landlords will appreciate a good tenant and not increase that regular, but they do in general.
It's not uncommon here for cars to be sold for more than they were bought (In TL). That in itself is a great example of the "purchasing" power, or lack thereof, of the Turkish Currency.