This is badly wrong. Brazil's plan wasn't to create "a currency with value attached to dollar", nor it was Argentina's plan. Argentina made a currency board,

This is badly wrong. Brazil's plan wasn't to create "a currency with value attached to dollar", nor it was Argentina's plan. Argentina made a currency board, a regime in which the central bank could only emit 1 peso more if 1 dollar more entered the country (and reached the central bank's vault). In Brazil, Argentina's plan was called "dolarization" and was dropped by André Lara Resende, Persio Arida and Edmar Bacha when they were thinking about the brazilian plan, Plano Real. In fact, what Brazil did was only to control government costs, stop printing money and stop the indexation of prices and contracts by creating a virtual currency whose value changed every day in the rate of inflation (so all things could be priced in this virtual currency, whose nominal value was fixed). After that, that virtual currency became real, was printed and called the Real, becoming the new brazilian currency. The Real had no need of dollar indexation to succeed, and its price in dollars wasn't fixed at all, the brazilian central bank only made a promise to keep its price in parity, with open-market operations, for some time, to boost confidence, then it would let the price fluctuate. This was stated and clear from the beggining of the plan's implementation.