Excuse me, but aren't those things criminal? It looks like you're confusing unions with the mob.
It is, sadly, a close thing in some places/lines of work. Try garbage pickup in New York city. I've heard of businesses whose employees were required to take home a bag of garbage every week because the contracted garbage company didn't pick up the garbage. Of course, it was either required legally or 'in your best interest' (for whatever reason, be it intact kneecaps or doing it allowed you to deal with other unionized labor you needed) to choose this company to be your garbage collector. No matter what they did or didn't do, you have to keep them on. And it happened to have unionized labor.
There are such things as good unions. The handle contract negotiations for their members (where I live they apply equally to non-members, who tend to be quite happy about that). And when they call for a strike, I think they even reimburse non-members for their lost income (non-members will have to chose whether they join the strike and lose income, or go to work and sit there on their own). Good unions do not demand any kind of exclusivity, and personally I think any kind of exclusivity contract needs to be illegal. (Unfortunately it rarely it.)
This is very true, and I wish it was more prevalent. Sadly, when a lot of money is concentrated in any one place, even .01% of it is a fortune to someone. There's too much profit to be had by finding/creating a small cesspool where a little bit of money flows in and never flows out. This goes for everything - government, labor, corporations.