Guesses, for the last decade or two: 1. Software developers have been paid very good money, and have seen little else to complain about. 2. Software developer

Guesses, for the last decade or two: 1. Software developers have been paid very good money, and have seen little else to complain about. 2. Software developers have been paid excessive flattery, and think they merit and achieve more individually than a union could get them. 3. Software developers have been hopping jobs so fast, never anywhere long enough to think they need a union.