Brazil was stuck with a very weak local currency one year back when there was acute shortage of US dollars to pay for the monthly imports. Now the situation is exactly the opposite with the flooding of cheap US currency into Brazil by the corporate sector.
The foreign fund flow is so high that the Brazil government has decided to tax the American Depositary shares to make these papers that much more unattractive for foreign investors. But the core solution to the issue is not with the Brazil government, but with the US FED which is not ready to stop printing and issuing fresh Dollars into the global financial system.