In Brazil, because people pay very high taxes when buying stuff -indirect taxes- and income taxation is so low and barely progressive, a very poor family will pay 33% of their total income in taxes, meanwhile the super rich will have to pay just 23%.
In Brazil, income inequality has historically been among the highest in the world, despite some modest improvements under Lula.
In Brazil, several attempts to reform this crazy tax system since 1995 have repeatedly failed to be enacted. In every attempt, party discipline evaporated and some members of the Parliament switched to the other side of the aisle just before the vote, or there were "sudden" corruption scandals in the media discrediting the reformist government of the time.
Write your own conspiracy theory down here...