Politicians tend to become worse and worse thinking and seeing from experience that they can "get away with it". But in reality all this time, the population gets more and more frustrated, and it's only a matter of time before the population revolts.
So far the Brazilian politicians have been lucky that all these 1 million people haven't become violent and ask for their blood. Because to be honest, I think at least some of the corrupt leaders need to be punished severely, possibly even with the death penalty (like Ceausescu was in Romania).
It's really the only way they'll learn their lesson, and more importantly, future generations of politicians will know now to upset the population to the point where they'll revolt and ask for their execution. I'm not usually pro-death penalty, but if there's anyone deserving it, it's the oppressive/corrupt leaders that make millions of people suffer through their ruling.
I definitely think the leaders intentionally abusing their own Constitution deserve the death penalty, because if they don't get that, then it's just an invitation for future leaders to abuse it. They swore to protect it and obey it, and there needs to be a way to force them to do just that. Otherwise what's the point? Imagine how different things would be in US, if politicians would fear death penalty if they abuse the Constitution, and keep passing unconstitutional laws.
I feel almost the same way about bankers who get away with their crimes. How are they supposed to learn their lesson if they aren't even threatened by prison time, even though they lost the pensions and deposits of millions of people? If they think they have the potential to earn tens of billions of hundreds of billions from risking the money of those people, they'll be much more inclined to do it if they only risk a couple of billion in penalty, and that's it.
The population is supposed to rectify these sort of abuses by the elite in a society. It's up to the population to ultimately decide how much of a punishment these people get, and if their "representatives" aren't up for it, then they need to change them, or at least scare them into applying their will.