That is not the idea that he had in mind when devaluing the currency. Instead of respecting the international money market exchange rates for USD to the Peso, he has unilaterally declared a new value which is about half of what it was before. The idea is to make Argentinian goods and labor competitive on the international market so the country can vacuum up huge sums of money from greedy investors.

That idea is dumb though because investors tend to want some kind of political stability. They will not just say "Oh I can build my widget for 30% cheaper in Argentina because of this money woo" - they will say "Oh, Argentina will probably seize my assets if we invest there because they're being run by a nutjob dictator."