"Many do have a 'union' but it is a toothless staff association by any other name."
Indeed. I have the Law Society (which contrary to the media-driven impression is actually generally thought of as being pretty useless at the big stuff by lawyers) and there is a work union which, in the only piece of any literature I have ever got from them, stated cases so incorrectly they managed to lose any credibility without any rebuttal required form those they were attacking. And that's in a large/huge organisation that you would think could support a union. Ergo very little protection for going on strike.
Not a pop at the public sector, as I say, I've got sympathy there; but to portray the private sector as meek followers of convention who are too scared to act and have no interest in understanding the troubles of those in the public sector is just as wrong as those in the private sector suggesting their public brethren are sitting on piles of gold and only having to work 3 hour days.