Russ Roberts tells the truth

On unions:

The effect of unions, to the extent they are effective at all, is to make it harder for people to find work in particular areas. Unions try to raise wages above what they would otherwise be. Employers respond by trying to substitute capital for labor or more skilled workers for less skilled workers.

You want negotiating power? Get educated. Get a skill. What keeps wages up in a world of 7% unionization in the private sector is that I have alternatives. So stay in school and study something serious that has value alongside whatever else you’re interested in. Or study something interesting that has little market value. But if you do that, don’t complain about your low salary and lack of a union.

The bottom line–you don’t need a union to protect you from your employer. You need alternatives–you need to have a skill that more than one employer values. If you have no skills, you are in trouble and the union won’t help you either except at the expense of other workers.