Earlier quoted context omitted.
As a Brazilian, I am not pleased. This will become just another tool for the government to create artificial difficulties and sell solutions to its closest "friends". Standards have been created without any government's help since forever.
Can you name examples?
The government is making this for the exact reason someone else mentioned: We're at the mercy for a handful of big players, and that's enough. One open standard for all is good. (Edit: It's also an "economy" controlling standard. Not aimed at end users. It's something for the Central Bank to keep notes on what's happening with the money going around.)
The documentation sadly is in portuguese and in PDF: https://www.bcb.gov.br/content/estabilidadefinanceira/forump...
You can find more by looking on Google for: Banco Central PIX PDF
Personal note: A lot of people sadly still believe everything the government makes equals bad or equals to something that was idealized/created by the current president in office. It's not the case here by any means (the Brazilian Central Bank runs "independently") but unfortunately a lot of people see it that way.