What you're talking about sounds more like professionalizing than unionizing (although, outside the U.S., the contrast is less profound). For the reasons you c

What you're talking about sounds more like professionalizing than unionizing (although, outside the U.S., the contrast is less profound). For the reasons you cite, it's a nice idea. The immediate answer is because nobody would agree on what a developer is (do front end developers count? web designers? excel macros?).