Russ Roberts has good advice for anyone who wants to earn a decent living. 
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.