Of course these people are paid, in addition transportation, hotels, and meals are often covered as well. This is not a secret, there are literally thousands and thousands of people involved. These people are hired like movie extras when they need a really large crowd. The piqueteros are a different catergory as they are paid as full time employees. I believe they are paid about $2,200 pesos a month. You have to apply with them like a job and be hired. You just can't show up and start recieving the money. It sounds like a pretty sweet deal if you can get it (don't know if they take ex-pats). Basically you have no regular duties or hours to keep. You only have to be available for the occasional meeting. I'm told they do check attendance and the money is cut if you don't show. You must also be willing to go to demonstrations and attend political speeches. My guess all this is at most just a few hours a week, however they do have their busy periods such as the just ending problem with the farmers. Of course at least some of these people are available to break a few heads when called upon. Keeping control of the streets and intimidating the population is the ultimate objective of the regime. Kind of reminds me of what went on in Germany back in the thirties.
Fortunately for Argentina all the threats and imtimidation didn't work during the farm crisis. My guess is a lot of the extra money that would have come with the retentions would have been used along the same lines, i.e. more payments to more people to increase the regimes hold on power.Nice to know that the tax revenues here are put to such a productive use.