I almost expounded so far as to say “so are corporations”*. But that’s a can of worms. I’ll pause for a moment to note that most unions, like most businesses, are benign enough.
I’ll take your word on the regulations. Corporations have to pay special attention to public relations, however; they answer to stockholders, customers, potential customers, and the media. So when dealing with an external enemy, corporations must tread gently. Many corporations are not above a little abuse of process or monopolistic behavior when given a chance, of course.
On the other hand, corporations are often free to treat their employees terribly, unless the employees have a strong union to protect them. Retribution and extortion with threat of demotion or dismissal are common fare for wage-slaves, although it’s more subtle in a white-collar environment.
Unions have to sing and dance a bit, too, but not to the same tune. Their responsibility is to look after their members. And the members are very likely to approve of - and even participate in - a little mummery if it seems to be in their interest**.
Because of the strong loyalty unions command of their members, they are able to act more directly, using injury and destruction as means to achieve their ends with regards to both internal and external dissent. Union officials have also been known to draw inordinately large salaries and/or perks, accept bribes, and use their positions for personal or familial gain***.
Unions are also curiously political animals. Their endorsements are very influential. Occasionally these endorsements are not based on the candidate’s political position****.
So while union protections are better than nothing, they generate their own unique problems.
The correct answer: employee-owned corporations.
*Of course, all employers can abuse their hirelings. The worst atrocities often occur at small businesses. It’s just that corporations can do it on such a grand scale.
** Some unions seem to have aquired a reputation for being involved in organized crime. I can’t imagine why that could be.
*** This is also true of every position of power ever devised by mankind, not excluding the Papacy.
**** Unless that position involves the candidate on his knees, holding up a suitcase full of money.