I think being stingy, paying to the value of an item, and understanding where the market may be trying to rip you off are different.
In Argentina, especially for those earning in dollars, how can they complain if prices are on the rise? It is not even a question of being able to afford it or not. Yesterday I took an Uber, it was probably 3 to 4km, or however far it is from Velez stadium to Cuencan/Nogoya. For that trip I paid a grand total of 183 pesos, which is what just over one dollar? I think it would take someone out of touch with reality to be in any way upset about price increases. I see at as the prices going up to reflect the true value of things. The problem being, many locals will get pinched along the way.
Now, having no right to be upset over a rising price because one can easily afford it is something different. I follow the smartphone world closely. Five years ago, a flagship device cost around $600-$700 but these days they cost upwards of $1,000. I can afford to buy the latest "whatever" from "Brand X" but I am still upset about the price increase over the years because I think it's the companies simply doing it because they can. I am not a cheapskate for not buying those $1,000 devices, nor am I one for being upset by what I think is market trickery.
Moaning about having to pay 20% more for a loaf of bread when the value of your dollar income has increased 50% in a year (or whatever the numbers may be), sure.