BRASILIA – An avalanche of disinformation about a new economic measure proved so tricky for Brazil’s government to navigate that they backtracked entirely this week in a rout egged on by the opposition.The political fiasco centered around the beloved instant money transfer system known as PIX, used tens of millions of times a day by Brazilians for everything from paying bills to giving money to beggars on the street.It all started when new government rules kicked in on 1 January including PIX in the institutions whose financial transactions would be tracked in a bid to combat tax…