How to tell the difference between a scientist and a plumber - have them pronounce "unionize."
Seriously, I think just about everywhere should have a union and I don't think it's ever going to happen. What made unions so strong in the first place were their leaders - old fashioned capitalists who saw that the stronger the union, the more wealth and power for them. So who cares about little things like legalities when it comes to making a business submit. We don't have that any more, so unions can't be as every bit as sleazy as the businesses, and thus the fangs have been pulled. And businesses are buying off the regulators, buying off the politicians and anyone else needed to ignore their barely legal or flat out illegal doings that are stripping more and more workers' rights away.