Cant really understand this guy.
He said in Brazil exchange rate depreciation boosts inflation and hinders growth. Well, for most shocks I can think of causing a depreciation, I fully agree with him. The problem, it seems, is that he doesnt agree with himself. Why? Because he was one of the mentors behind the forced 2012 depreciation movement!
He also claimed that the government worrying about tariffs is not interventionism, it is catering to society's needs. This was a cheap, and wrong. Society is paying the cost these guys imposed on the provision of electricity, but it is sort of hidden in transfers from the government to the suppliers. Moreover, it looks like Nelson did not study auctions theory with sufficient care. You can defeat market power through auctions, Nelson. You dont have to meddle directly with prices to help society. Actually, by doing so you end up making things worse.