I'd like to make a subtle but critical adjustment to your statement: "A union is a legal framework for the employees which has the ability to recast the power

I'd like to make a subtle but critical adjustment to your statement: "A union is a legal framework for the employees which has the ability to recast the power balance and can do it in their favour, if it so chooses." Unions are definitely capable of doing this thing, and some do it. They do not necessarily do this thing, and some do not. The common failure mode is that an entrenched union is run by a group of people who act very much like company management, profit immensely from this arrangement, and remain in power by employing forms of the pirate ship loot splitting strategy. (The pirate ship captain must propose a split of the loot, which the crew votes on. If they vote in favour, the loot split goes ahead, and if not then the captain is thrown overboard. The correct solution is to divide the loot equally between 51% of the crew including the captain, and allocate none to the rest.) The worst unions are definitely not a framework for laziness, but they do tend to be bad for businesses as their primary function is to suck money out of the company and give it to union leaders. The best unions make everybody better off, including the employers. Some companies have internalised the functions of the best unions, because they realised that this makes everybody better off, so don't have any real need for unions. Some companies have internalised the functions of the worst unions and are engaged in an asset-stripping operation. There is a tendency for older unions to be worse than newer ones. Setting up a union will almost certainly be good for the people who set it up. Joining an established union may or may not be good for you; if you're thinking about joining a union then research this union carefully and figure out if they're going to be good for you. Keep in mind that bad unions tend to be extremely political and will be surrounded by propaganda - look for clear evidence of outcomes. If you're thinking about unionising in your workplace, please think carefully about this problem and how you're going to make sure that your union is one of the good ones. If you're thinking about running a company, please think carefully about how to be one of the companies that already does the work of the good unions.