Not sure about other countries, but there were a few trys in creating unions for software engineers in Brazil, where I live. They all failed for lack of interes

Not sure about other countries, but there were a few trys in creating unions for software engineers in Brazil, where I live. They all failed for lack of interest from the engineers themselves. Aside from that, you need to contribute with money for something that will not get you anything in the short term. Also the lack of transparency incentives corruption