Also the thing that goes unmentioned is that real wages in the US are declining, so yesterday's DD coffee used to cost 1/5 the minimum wage (hourly) but now costs 1/3.
Meanwhile, in 2003 the minimum hourly wage here could barely buy 1/2 a cup of coffee; now it can buy well over an entire cup (or the $24 cup in Clarín's analysis). This shows that things are still not ideal here if you need Starbucks to fill your tank, but the situation is improving here while in the US its getting much worse. (i.e., the opposite of what the article was trying to say).
This is even more clear if you look at things that are more essential than Mochaccinos. For example: Fuel. In 2003, the minimum monthly wage in Argentina could buy 130 L of petrol; now it is 313 L.