The most professionalised elements are the ones who end up in high-end places, because they made a real career of it. Because of that, it's likely that they are also the ones most represented by unions and associations that might be consulted by policymakers. So when a policymaker puts forward an idea to improve their condition, and gets back an icy or ambivalent response (as well as a very negative one from employers, of course), he'll just shelve it very quickly.