I'm brazilian and I don't think that its a WOHOO act or something. It's just that US and EU governments are so full of interests(and shit) that it looks good.
We don't have a big(and stupid) elite like the US does, so things stay reasonable.
"Brazil is probably no more corrupt than other countries of similar size and wealth. It came out better than China and India and a long way ahead of Russia in the latest index of perceptions of corruption compiled by Transparency International, a German NGO. Brazil is blessed with competitive and aggressive media and tenacious institutions that investigate such scandals, revolving around the public-prosecutor’s office, a semi-autonomous part of the federal government and its local equivalents. This scrutiny has a price: the government thinks that another watchdog, the audit tribunal, is holding up spending on infrastructure unnecessarily."
We don't have a big(and stupid) elite like the US does, so things stay reasonable.