Lol and look at the list of its leaders and attendees, many of them ex-convicts who were caught red handed in corruption and dirty dealings (co-incidentally who also saw their personal wealth skyrocket in hard to explain ways) and the rest of them sindicalistas widely suspected of running some of the biggest mafias and extortion rackets in Argentina (who as above, have also seen their wealth skyrocket in hard to explain ways).
Of course, their problem is judges who don't want to "cooperate" and if impunity here is as easy as claiming "political persecution" to nullify any charge, investigation or evidence, then being a politician is the perfect cover for any criminal and having a politician to protect you is a must have accessory of any serious criminal. Oh, wait...